src/Compilers/CSharp/Portable/Errors/ErrorCode.cs - main - githubmirror/roslyn

src/Compilers/CSharp/Portable/Errors/ErrorCode.cs
2 523 строки112 KB
Jan Jones
Unsafe evolution: relax `safe` modifier placement restrictions (#84602)
31 июл 2026, 10:47
31 июл 2026, 10:47c9f1270
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

namespace Microsoft.CodeAnalysis.CSharp
{
    internal enum ErrorCode
    {
        Void = InternalErrorCode.Void,
        Unknown = InternalErrorCode.Unknown,

        #region diagnostics introduced in C# 4 and earlier
        //FTL_InternalError = 1,
        //FTL_FailedToLoadResource = 2,
        //FTL_NoMemory = 3,
        //ERR_WarningAsError = 4,
        //ERR_MissingOptionArg = 5,
        ERR_NoMetadataFile = 6,
        //FTL_ComPlusInit = 7,
        //FTL_MetadataImportFailure = 8,    no longer used in Roslyn.
        FTL_MetadataCantOpenFile = 9,
        //ERR_FatalError = 10,
        //ERR_CantImportBase = 11,
        ERR_NoTypeDef = 12,
        //FTL_MetadataEmitFailure = 13,     Roslyn does not catch stream writing exceptions. Those are propagated to the caller.
        //FTL_RequiredFileNotFound = 14,
        //ERR_ClassNameTooLong = 15,    Deprecated in favor of ERR_MetadataNameTooLong.
        ERR_OutputWriteFailed = 16,
        ERR_MultipleEntryPoints = 17,
        //ERR_UnimplementedOp = 18,
        ERR_BadBinaryOps = 19,
        ERR_IntDivByZero = 20,
        ERR_BadIndexLHS = 21,
        ERR_BadIndexCount = 22,
        ERR_BadUnaryOp = 23,
        //ERR_NoStdLib = 25,        not used in Roslyn
        ERR_ThisInStaticMeth = 26,
        ERR_ThisInBadContext = 27,
        WRN_InvalidMainSig = 28,
        ERR_NoImplicitConv = 29, // Requires SymbolDistinguisher.
        ERR_NoExplicitConv = 30, // Requires SymbolDistinguisher.
        ERR_ConstOutOfRange = 31,
        ERR_AmbigBinaryOps = 34,
        ERR_AmbigUnaryOp = 35,
        ERR_InAttrOnOutParam = 36,
        ERR_ValueCantBeNull = 37,
        //ERR_WrongNestedThis = 38,     No longer given in Roslyn. Less specific ERR_ObjectRequired "An object reference is required for the non-static..."
        ERR_NoExplicitBuiltinConv = 39, // Requires SymbolDistinguisher.
        //FTL_DebugInit = 40,           Not used in Roslyn. Roslyn gives FTL_DebugEmitFailure with specific error code info.
        FTL_DebugEmitFailure = 41,
        //FTL_DebugInitFile = 42,       Not used in Roslyn. Roslyn gives ERR_CantOpenFileWrite with specific error info.
        //FTL_BadPDBFormat = 43,        Not used in Roslyn. Roslyn gives FTL_DebugEmitFailure with specific error code info.
        ERR_BadVisReturnType = 50,
        ERR_BadVisParamType = 51,
        ERR_BadVisFieldType = 52,
        ERR_BadVisPropertyType = 53,
        ERR_BadVisIndexerReturn = 54,
        ERR_BadVisIndexerParam = 55,
        ERR_BadVisOpReturn = 56,
        ERR_BadVisOpParam = 57,
        ERR_BadVisDelegateReturn = 58,
        ERR_BadVisDelegateParam = 59,
        ERR_BadVisBaseClass = 60,
        ERR_BadVisBaseInterface = 61,
        ERR_EventNeedsBothAccessors = 65,
        ERR_EventNotDelegate = 66,
        WRN_UnreferencedEvent = 67,
        ERR_InterfaceEventInitializer = 68,
        //ERR_EventPropertyInInterface = 69,
        ERR_BadEventUsage = 70,
        ERR_ExplicitEventFieldImpl = 71,
        ERR_CantOverrideNonEvent = 72,
        ERR_AddRemoveMustHaveBody = 73,
        ERR_AbstractEventInitializer = 74,
        ERR_PossibleBadNegCast = 75,
        ERR_ReservedEnumerator = 76,
        ERR_AsMustHaveReferenceType = 77,
        WRN_LowercaseEllSuffix = 78,
        ERR_BadEventUsageNoField = 79,
        ERR_ConstraintOnlyAllowedOnGenericDecl = 80,
        ERR_TypeParamMustBeIdentifier = 81,
        ERR_MemberReserved = 82,
        ERR_DuplicateParamName = 100,
        ERR_DuplicateNameInNS = 101,
        ERR_DuplicateNameInClass = 102,
        ERR_NameNotInContext = 103,
        ERR_AmbigContext = 104,
        WRN_DuplicateUsing = 105,
        ERR_BadMemberFlag = 106,
        ERR_BadMemberProtection = 107,
        WRN_NewRequired = 108,
        WRN_NewNotRequired = 109,
        ERR_CircConstValue = 110,
        ERR_MemberAlreadyExists = 111,
        ERR_StaticNotVirtual = 112,
        ERR_OverrideNotNew = 113,
        WRN_NewOrOverrideExpected = 114,
        ERR_OverrideNotExpected = 115,
        ERR_NamespaceUnexpected = 116,
        ERR_NoSuchMember = 117,
        ERR_BadSKknown = 118,
        ERR_BadSKunknown = 119,
        ERR_ObjectRequired = 120,
        ERR_AmbigCall = 121,
        ERR_BadAccess = 122,
        ERR_MethDelegateMismatch = 123,
        ERR_RetObjectRequired = 126,
        ERR_RetNoObjectRequired = 127,
        ERR_LocalDuplicate = 128,
        ERR_AssgLvalueExpected = 131,
        ERR_StaticConstParam = 132,
        ERR_NotConstantExpression = 133,
        ERR_NotNullConstRefField = 134,
        // ERR_NameIllegallyOverrides = 135, // Not used in Roslyn anymore due to 'Single Meaning' relaxation changes
        ERR_LocalIllegallyOverrides = 136,
        ERR_BadUsingNamespace = 138,
        ERR_NoBreakOrCont = 139,
        ERR_DuplicateLabel = 140,
        ERR_NoConstructors = 143,
        ERR_NoNewAbstract = 144,
        ERR_ConstValueRequired = 145,
        ERR_CircularBase = 146,
        ERR_BadDelegateConstructor = 148,
        ERR_MethodNameExpected = 149,
        ERR_ConstantExpected = 150,
        // ERR_V6SwitchGoverningTypeValueExpected shares the same error code (CS0151) with ERR_IntegralTypeValueExpected in Dev10 compiler.
        // However ERR_IntegralTypeValueExpected is currently unused and hence being removed. If we need to generate this error in future
        // we can use error code CS0166. CS0166 was originally reserved for ERR_SwitchFallInto in Dev10, but was never used.
        ERR_V6SwitchGoverningTypeValueExpected = 151,
        ERR_DuplicateCaseLabel = 152,
        ERR_InvalidGotoCase = 153,
        ERR_PropertyLacksGet = 154,
        ERR_BadExceptionType = 155,
        ERR_BadEmptyThrow = 156,
        ERR_BadFinallyLeave = 157,
        ERR_LabelShadow = 158,
        ERR_LabelNotFound = 159,
        ERR_UnreachableCatch = 160,
        ERR_ReturnExpected = 161,
        WRN_UnreachableCode = 162,
        ERR_SwitchFallThrough = 163,
        WRN_UnreferencedLabel = 164,
        ERR_UseDefViolation = 165,
        //ERR_NoInvoke = 167,
        WRN_UnreferencedVar = 168,
        WRN_UnreferencedField = 169,
        ERR_UseDefViolationField = 170,
        ERR_UnassignedThisUnsupportedVersion = 171,
        ERR_AmbigQM = 172,
        ERR_InvalidQM = 173, // Requires SymbolDistinguisher.
        ERR_NoBaseClass = 174,
        ERR_BaseIllegal = 175,
        ERR_ObjectProhibited = 176,
        ERR_ParamUnassigned = 177,
        ERR_InvalidArray = 178,
        ERR_ExternHasBody = 179,
        ERR_AbstractAndExtern = 180,
        ERR_BadAttributeParamType = 181,
        ERR_BadAttributeArgument = 182,
        WRN_IsAlwaysTrue = 183,
        WRN_IsAlwaysFalse = 184,
        ERR_LockNeedsReference = 185,
        ERR_NullNotValid = 186,
        ERR_UseDefViolationThisUnsupportedVersion = 188,
        ERR_ArgsInvalid = 190,
        ERR_AssgReadonly = 191,
        ERR_RefReadonly = 192,
        ERR_PtrExpected = 193,
        ERR_PtrIndexSingle = 196,
        WRN_ByRefNonAgileField = 197,
        ERR_AssgReadonlyStatic = 198,
        ERR_RefReadonlyStatic = 199,
        ERR_AssgReadonlyProp = 200,
        ERR_IllegalStatement = 201,
        ERR_BadGetEnumerator = 202,
        ERR_TooManyLocals = 204,
        ERR_AbstractBaseCall = 205,
        ERR_RefProperty = 206,
        // WRN_OldWarning_UnsafeProp = 207,    // This error code is unused.
        ERR_ManagedAddr = 208,
        ERR_BadFixedInitType = 209,
        ERR_FixedMustInit = 210,
        ERR_InvalidAddrOp = 211,
        ERR_FixedNeeded = 212,
        ERR_FixedNotNeeded = 213,
        ERR_UnsafeNeeded = 214,
        ERR_OpTFRetType = 215,
        ERR_OperatorNeedsMatch = 216,
        ERR_BadBoolOp = 217,
        ERR_MustHaveOpTF = 218,
        WRN_UnreferencedVarAssg = 219,
        ERR_CheckedOverflow = 220,
        ERR_ConstOutOfRangeChecked = 221,
        ERR_BadVarargs = 224,
        ERR_ParamsMustBeCollection = 225,
        ERR_IllegalArglist = 226,
        ERR_IllegalUnsafe = 227,
        //ERR_NoAccessibleMember = 228,
        ERR_AmbigMember = 229,
        ERR_BadForeachDecl = 230,
        ERR_ParamsLast = 231,
        ERR_SizeofUnsafe = 233,
        ERR_DottedTypeNameNotFoundInNS = 234,
        ERR_FieldInitRefNonstatic = 236,
        ERR_SealedNonOverride = 238,
        ERR_CantOverrideSealed = 239,
        //ERR_NoDefaultArgs = 241,
        ERR_VoidError = 242,
        ERR_ConditionalOnOverride = 243,
        ERR_PointerInAsOrIs = 244,
        ERR_CallingFinalizeDeprecated = 245, //Dev10: ERR_CallingFinalizeDepracated
        ERR_SingleTypeNameNotFound = 246,
        ERR_NegativeStackAllocSize = 247,
        ERR_NegativeArraySize = 248,
        ERR_OverrideFinalizeDeprecated = 249,
        ERR_CallingBaseFinalizeDeprecated = 250,
        WRN_NegativeArrayIndex = 251,
        WRN_BadRefCompareLeft = 252,
        WRN_BadRefCompareRight = 253,
        ERR_BadCastInFixed = 254,
        ERR_StackallocInCatchFinally = 255,
        ERR_VarargsLast = 257,
        ERR_MissingPartial = 260,
        ERR_PartialTypeKindConflict = 261,
        ERR_PartialModifierConflict = 262,
        ERR_PartialMultipleBases = 263,
        ERR_PartialWrongTypeParams = 264,
        ERR_PartialWrongConstraints = 265,
        ERR_NoImplicitConvCast = 266, // Requires SymbolDistinguisher.
        ERR_PartialMisplaced = 267,
        ERR_ImportedCircularBase = 268,
        ERR_UseDefViolationOut = 269,
        ERR_ArraySizeInDeclaration = 270,
        ERR_InaccessibleGetter = 271,
        ERR_InaccessibleSetter = 272,
        ERR_InvalidPropertyAccessMod = 273,
        ERR_DuplicatePropertyAccessMods = 274,
        //ERR_PropertyAccessModInInterface = 275,
        ERR_AccessModMissingAccessor = 276,
        ERR_UnimplementedInterfaceAccessor = 277,
        WRN_PatternIsAmbiguous = 278,
        WRN_PatternNotPublicOrNotInstance = 279,
        WRN_PatternBadSignature = 280,
        ERR_FriendRefNotEqualToThis = 281,
        WRN_SequentialOnPartialClass = 282,
        ERR_BadConstType = 283,
        ERR_NoNewTyvar = 304,
        ERR_BadArity = 305,
        ERR_BadTypeArgument = 306,
        ERR_TypeArgsNotAllowed = 307,
        ERR_HasNoTypeVars = 308,
        ERR_NewConstraintNotSatisfied = 310,
        ERR_GenericConstraintNotSatisfiedRefType = 311, // Requires SymbolDistinguisher.
        ERR_GenericConstraintNotSatisfiedNullableEnum = 312, // Uses (but doesn't require) SymbolDistinguisher.
        ERR_GenericConstraintNotSatisfiedNullableInterface = 313, // Uses (but doesn't require) SymbolDistinguisher.
        ERR_GenericConstraintNotSatisfiedTyVar = 314, // Requires SymbolDistinguisher.
        ERR_GenericConstraintNotSatisfiedValType = 315, // Requires SymbolDistinguisher.
        ERR_DuplicateGeneratedName = 316,
        // unused 317-399
        ERR_GlobalSingleTypeNameNotFound = 400,
        ERR_NewBoundMustBeLast = 401,
        WRN_MainCantBeGeneric = 402,
        ERR_TypeVarCantBeNull = 403,
        // ERR_AttributeCantBeGeneric = 404,
        ERR_DuplicateBound = 405,
        ERR_ClassBoundNotFirst = 406,
        ERR_BadRetType = 407,
        ERR_DuplicateConstraintClause = 409,
        //ERR_WrongSignature = 410,     unused in Roslyn
        ERR_CantInferMethTypeArgs = 411,
        ERR_LocalSameNameAsTypeParam = 412,
        ERR_AsWithTypeVar = 413,
        WRN_UnreferencedFieldAssg = 414,
        ERR_BadIndexerNameAttr = 415,
        ERR_AttrArgWithTypeVars = 416,
        ERR_NewTyvarWithArgs = 417,
        ERR_AbstractSealedStatic = 418,
        WRN_AmbiguousXMLReference = 419,
        WRN_VolatileByRef = 420,
        // WRN_IncrSwitchObsolete = 422,    // This error code is unused.
        ERR_ComImportWithImpl = 423,
        ERR_ComImportWithBase = 424,
        ERR_ImplBadConstraints = 425,
        ERR_DottedTypeNameNotFoundInAgg = 426,
        ERR_MethGrpToNonDel = 428,
        // WRN_UnreachableExpr = 429,       // This error code is unused.
        ERR_BadExternAlias = 430,
        ERR_ColColWithTypeAlias = 431,
        ERR_AliasNotFound = 432,
        ERR_SameFullNameAggAgg = 433,
        ERR_SameFullNameNsAgg = 434,
        WRN_SameFullNameThisNsAgg = 435,
        WRN_SameFullNameThisAggAgg = 436,
        WRN_SameFullNameThisAggNs = 437,
        ERR_SameFullNameThisAggThisNs = 438,
        ERR_ExternAfterElements = 439,
        WRN_GlobalAliasDefn = 440,
        ERR_SealedStaticClass = 441,
        ERR_PrivateAbstractAccessor = 442,
        ERR_ValueExpected = 443,
        // WRN_UnexpectedPredefTypeLoc = 444,  // This error code is unused.
        ERR_UnboxNotLValue = 445,
        ERR_AnonMethGrpInForEach = 446,
        //ERR_AttrOnTypeArg = 447,      unused in Roslyn. The scenario for which this error exists should, and does generate a parse error.
        ERR_BadIncDecRetType = 448,
        ERR_TypeConstraintsMustBeUniqueAndFirst = 449,
        ERR_RefValBoundWithClass = 450,
        ERR_NewBoundWithVal = 451,
        ERR_RefConstraintNotSatisfied = 452,
        ERR_ValConstraintNotSatisfied = 453,
        ERR_CircularConstraint = 454,
        ERR_BaseConstraintConflict = 455,
        ERR_ConWithValCon = 456,
        ERR_AmbigUDConv = 457,
        WRN_AlwaysNull = 458,
        // ERR_AddrOnReadOnlyLocal = 459, // no longer an error
        ERR_OverrideWithConstraints = 460,
        ERR_AmbigOverride = 462,
        ERR_DecConstError = 463,
        WRN_CmpAlwaysFalse = 464,
        WRN_FinalizeMethod = 465,
        ERR_ExplicitImplParams = 466,
        // WRN_AmbigLookupMeth = 467,      //no longer issued in Roslyn
        //ERR_SameFullNameThisAggThisAgg = 468, no longer used in Roslyn
        WRN_GotoCaseShouldConvert = 469,
        ERR_MethodImplementingAccessor = 470,
        //ERR_TypeArgsNotAllowedAmbig = 471,    no longer issued in Roslyn
        WRN_NubExprIsConstBool = 472,
        WRN_ExplicitImplCollision = 473,
        // unused 474-499
        ERR_AbstractHasBody = 500,
        ERR_ConcreteMissingBody = 501,
        ERR_AbstractAndSealed = 502,
        ERR_AbstractNotVirtual = 503,
        ERR_StaticConstant = 504,
        ERR_CantOverrideNonFunction = 505,
        ERR_CantOverrideNonVirtual = 506,
        ERR_CantChangeAccessOnOverride = 507,
        ERR_CantChangeReturnTypeOnOverride = 508,
        ERR_CantDeriveFromSealedType = 509,
        ERR_AbstractInConcreteClass = 513,
        ERR_StaticConstructorWithExplicitConstructorCall = 514,
        ERR_StaticConstructorWithAccessModifiers = 515,
        ERR_RecursiveConstructorCall = 516,
        ERR_ObjectCallingBaseConstructor = 517,
        ERR_PredefinedTypeNotFound = 518,
        //ERR_PredefinedTypeBadType = 520,
        ERR_StructWithBaseConstructorCall = 522,
        ERR_StructLayoutCycle = 523,
        //ERR_InterfacesCannotContainTypes = 524,
        ERR_InterfacesCantContainFields = 525,
        ERR_InterfacesCantContainConstructors = 526,
        ERR_NonInterfaceInInterfaceList = 527,
        ERR_DuplicateInterfaceInBaseList = 528,
        ERR_CycleInInterfaceInheritance = 529,
        //ERR_InterfaceMemberHasBody = 531,
        ERR_HidingAbstractMethod = 533,
        ERR_UnimplementedAbstractMethod = 534,
        ERR_UnimplementedInterfaceMember = 535,
        ERR_ObjectCantHaveBases = 537,
        ERR_ExplicitInterfaceImplementationNotInterface = 538,
        ERR_InterfaceMemberNotFound = 539,
        ERR_ClassDoesntImplementInterface = 540,
        ERR_ExplicitInterfaceImplementationInNonClassOrStruct = 541,
        ERR_MemberNameSameAsType = 542,
        ERR_EnumeratorOverflow = 543,
        ERR_CantOverrideNonProperty = 544,
        ERR_NoGetToOverride = 545,
        ERR_NoSetToOverride = 546,
        ERR_PropertyCantHaveVoidType = 547,
        ERR_PropertyWithNoAccessors = 548,
        ERR_NewVirtualInSealed = 549,
        ERR_ExplicitPropertyAddingAccessor = 550,
        ERR_ExplicitPropertyMissingAccessor = 551,
        ERR_ConversionWithInterface = 552,
        ERR_ConversionWithBase = 553,
        ERR_ConversionWithDerived = 554,
        ERR_IdentityConversion = 555,
        ERR_ConversionNotInvolvingContainedType = 556,
        ERR_DuplicateConversionInClass = 557,
        ERR_OperatorsMustBeStaticAndPublic = 558,
        ERR_BadIncDecSignature = 559,
        ERR_BadUnaryOperatorSignature = 562,
        ERR_BadBinaryOperatorSignature = 563,
        ERR_BadShiftOperatorSignature = 564,
        ERR_InterfacesCantContainConversionOrEqualityOperators = 567,
        //ERR_StructsCantContainDefaultConstructor = 568,
        ERR_CantOverrideBogusMethod = 569,
        ERR_BindToBogus = 570,
        ERR_CantCallSpecialMethod = 571,
        ERR_BadTypeReference = 572,
        //ERR_FieldInitializerInStruct = 573,
        ERR_BadDestructorName = 574,
        ERR_OnlyClassesCanContainDestructors = 575,
        ERR_ConflictAliasAndMember = 576,
        ERR_ConditionalOnSpecialMethod = 577,
        ERR_ConditionalMustReturnVoid = 578,
        ERR_DuplicateAttribute = 579,
        ERR_ConditionalOnInterfaceMethod = 582,
        //ERR_ICE_Culprit = 583,            No ICE in Roslyn. All of these are unused
        //ERR_ICE_Symbol = 584,
        //ERR_ICE_Node = 585,
        //ERR_ICE_File = 586,
        //ERR_ICE_Stage = 587,
        //ERR_ICE_Lexer = 588,
        //ERR_ICE_Parser = 589,
        ERR_OperatorCantReturnVoid = 590,
        ERR_InvalidAttributeArgument = 591,
        ERR_AttributeOnBadSymbolType = 592,
        ERR_FloatOverflow = 594,
        ERR_InvalidReal = 595,
        ERR_ComImportWithoutUuidAttribute = 596,
        ERR_InvalidNamedArgument = 599,
        ERR_DllImportOnInvalidMethod = 601,
        // WRN_FeatureDeprecated = 602,    // This error code is unused.
        // ERR_NameAttributeOnOverride = 609, // removed in Roslyn
        ERR_FieldCantBeRefAny = 610,
        ERR_ArrayElementCantBeRefAny = 611,
        WRN_DeprecatedSymbol = 612,
        ERR_NotAnAttributeClass = 616,
        ERR_BadNamedAttributeArgument = 617,
        WRN_DeprecatedSymbolStr = 618,
        ERR_DeprecatedSymbolStr = 619,
        ERR_IndexerCantHaveVoidType = 620,
        ERR_VirtualPrivate = 621,
        ERR_ArrayInitToNonArrayType = 622,
        ERR_ArrayInitInBadPlace = 623,
        ERR_MissingStructOffset = 625,
        WRN_ExternMethodNoImplementation = 626,
        WRN_ProtectedInSealed = 628,
        ERR_InterfaceImplementedByConditional = 629,
        ERR_InterfaceImplementedImplicitlyByVariadic = 630,
        ERR_IllegalRefParam = 631,
        ERR_BadArgumentToAttribute = 633,
        //ERR_MissingComTypeOrMarshaller = 635,
        ERR_StructOffsetOnBadStruct = 636,
        ERR_StructOffsetOnBadField = 637,
        ERR_AttributeUsageOnNonAttributeClass = 641,
        WRN_PossibleMistakenNullStatement = 642,
        ERR_DuplicateNamedAttributeArgument = 643,
        ERR_DeriveFromEnumOrValueType = 644,
        //ERR_IdentifierTooLong = 645,    //not used in Roslyn. See ERR_MetadataNameTooLong
        ERR_DefaultMemberOnIndexedType = 646,
        //ERR_CustomAttributeError = 647,
        ERR_BogusType = 648,
        WRN_UnassignedInternalField = 649,
        ERR_CStyleArray = 650,
        WRN_VacuousIntegralComp = 652,
        ERR_AbstractAttributeClass = 653,
        ERR_BadNamedAttributeArgumentType = 655,
        ERR_MissingPredefinedMember = 656,
        WRN_AttributeLocationOnBadDeclaration = 657,
        WRN_InvalidAttributeLocation = 658,
        WRN_EqualsWithoutGetHashCode = 659,
        WRN_EqualityOpWithoutEquals = 660,
        WRN_EqualityOpWithoutGetHashCode = 661,
        ERR_OutAttrOnRefParam = 662,
        ERR_OverloadRefKind = 663,
        ERR_LiteralDoubleCast = 664,
        WRN_IncorrectBooleanAssg = 665,
        ERR_ProtectedInStruct = 666,
        //ERR_FeatureDeprecated = 667,
        ERR_InconsistentIndexerNames = 668, // Named 'ERR_InconsistantIndexerNames' in native compiler
        ERR_ComImportWithUserCtor = 669,
        ERR_FieldCantHaveVoidType = 670,
        WRN_NonObsoleteOverridingObsolete = 672,
        ERR_SystemVoid = 673,
        ERR_ExplicitParamArrayOrCollection = 674,
        WRN_BitwiseOrSignExtend = 675,
        ERR_VolatileStruct = 677,
        ERR_VolatileAndReadonly = 678,
        // WRN_OldWarning_ProtectedInternal = 679,    // This error code is unused.
        // WRN_OldWarning_AccessibleReadonly = 680,    // This error code is unused.
        ERR_AbstractField = 681,
        ERR_BogusExplicitImpl = 682,
        ERR_ExplicitMethodImplAccessor = 683,
        WRN_CoClassWithoutComImport = 684,
        ERR_ConditionalWithOutParam = 685,
        ERR_AccessorImplementingMethod = 686,
        ERR_AliasQualAsExpression = 687,
        ERR_DerivingFromATyVar = 689,
        //FTL_MalformedMetadata = 690,
        ERR_DuplicateTypeParameter = 692,
        WRN_TypeParameterSameAsOuterTypeParameter = 693,
        ERR_TypeVariableSameAsParent = 694,
        ERR_UnifyingInterfaceInstantiations = 695,
        // ERR_GenericDerivingFromAttribute = 698,
        ERR_TyVarNotFoundInConstraint = 699,
        ERR_BadBoundType = 701,
        ERR_SpecialTypeAsBound = 702,
        ERR_BadVisBound = 703,
        ERR_LookupInTypeVariable = 704,
        ERR_BadConstraintType = 706,
        ERR_InstanceMemberInStaticClass = 708,
        ERR_StaticBaseClass = 709,
        ERR_ConstructorInStaticClass = 710,
        ERR_DestructorInStaticClass = 711,
        ERR_InstantiatingStaticClass = 712,
        ERR_StaticDerivedFromNonObject = 713,
        ERR_StaticClassInterfaceImpl = 714,
        ERR_OperatorInStaticClass = 715,
        ERR_ConvertToStaticClass = 716,
        ERR_ConstraintIsStaticClass = 717,
        ERR_GenericArgIsStaticClass = 718,
        ERR_ArrayOfStaticClass = 719,
        ERR_IndexerInStaticClass = 720,
        ERR_ParameterIsStaticClass = 721,
        ERR_ReturnTypeIsStaticClass = 722,
        ERR_VarDeclIsStaticClass = 723,
        ERR_BadEmptyThrowInFinally = 724,
        //ERR_InvalidDecl = 725,
        ERR_InvalidSpecifier = 726,
        //ERR_InvalidSpecifierUnk = 727,
        WRN_AssignmentToLockOrDispose = 728,
        ERR_ForwardedTypeInThisAssembly = 729,
        ERR_ForwardedTypeIsNested = 730,
        ERR_CycleInTypeForwarder = 731,
        //ERR_FwdedGeneric = 733,
        ERR_AssemblyNameOnNonModule = 734,
        ERR_InvalidFwdType = 735,
        ERR_CloseUnimplementedInterfaceMemberStatic = 736,
        ERR_CloseUnimplementedInterfaceMemberNotPublic = 737,
        ERR_CloseUnimplementedInterfaceMemberWrongReturnType = 738,
        ERR_DuplicateTypeForwarder = 739,
        ERR_ExpectedSelectOrGroup = 742,
        ERR_ExpectedContextualKeywordOn = 743,
        ERR_ExpectedContextualKeywordEquals = 744,
        ERR_ExpectedContextualKeywordBy = 745,
        ERR_InvalidAnonymousTypeMemberDeclarator = 746,
        ERR_InvalidInitializerElementInitializer = 747,
        ERR_InconsistentLambdaParameterUsage = 748,
        ERR_PartialMemberCannotBeAbstract = 750,
        ERR_PartialMemberOnlyInPartialClass = 751,
        // ERR_PartialMethodCannotHaveOutParameters = 752, Removed as part of 'extended partial methods' feature
        // ERR_PartialMethodOnlyMethods = 753, Removed as it is subsumed by ERR_PartialMisplaced
        ERR_PartialMemberNotExplicit = 754,
        ERR_PartialMethodExtensionDifference = 755,
        ERR_PartialMethodOnlyOneLatent = 756,
        ERR_PartialMethodOnlyOneActual = 757,
        ERR_PartialMemberParamsDifference = 758,
        ERR_PartialMethodMustHaveLatent = 759,
        ERR_PartialMethodInconsistentConstraints = 761,
        ERR_PartialMethodToDelegate = 762,
        ERR_PartialMemberStaticDifference = 763,
        ERR_PartialMemberUnsafeDifference = 764,
        ERR_PartialMethodInExpressionTree = 765,
        // ERR_PartialMethodMustReturnVoid = 766, Removed as part of 'extended partial methods' feature
        ERR_ExplicitImplCollisionOnRefOut = 767,
        ERR_IndirectRecursiveConstructorCall = 768,

        // unused 769-799
        //ERR_NoEmptyArrayRanges = 800,
        //ERR_IntegerSpecifierOnOneDimArrays = 801,
        //ERR_IntegerSpecifierMustBePositive = 802,
        //ERR_ArrayRangeDimensionsMustMatch = 803,
        //ERR_ArrayRangeDimensionsWrong = 804,
        //ERR_IntegerSpecifierValidOnlyOnArrays = 805,
        //ERR_ArrayRangeSpecifierValidOnlyOnArrays = 806,
        //ERR_UseAdditionalSquareBrackets = 807,
        //ERR_DotDotNotAssociative = 808,
        WRN_ObsoleteOverridingNonObsolete = 809,
        WRN_DebugFullNameTooLong = 811,                                 // Dev11 name: ERR_DebugFullNameTooLong
        ERR_ImplicitlyTypedVariableAssignedBadValue = 815,              // Dev10 name: ERR_ImplicitlyTypedLocalAssignedBadValue
        ERR_ImplicitlyTypedVariableWithNoInitializer = 818,             // Dev10 name: ERR_ImplicitlyTypedLocalWithNoInitializer
        ERR_ImplicitlyTypedVariableMultipleDeclarator = 819,            // Dev10 name: ERR_ImplicitlyTypedLocalMultipleDeclarator
        ERR_ImplicitlyTypedVariableAssignedArrayInitializer = 820,      // Dev10 name: ERR_ImplicitlyTypedLocalAssignedArrayInitializer
        ERR_ImplicitlyTypedLocalCannotBeFixed = 821,
        ERR_ImplicitlyTypedVariableCannotBeConst = 822,                 // Dev10 name: ERR_ImplicitlyTypedLocalCannotBeConst
        WRN_ExternCtorNoImplementation = 824,
        ERR_TypeVarNotFound = 825,
        ERR_ImplicitlyTypedArrayNoBestType = 826,
        ERR_AnonymousTypePropertyAssignedBadValue = 828,
        ERR_ExpressionTreeContainsBaseAccess = 831,
        ERR_ExpressionTreeContainsAssignment = 832,
        ERR_AnonymousTypeDuplicatePropertyName = 833,
        ERR_StatementLambdaToExpressionTree = 834,
        ERR_ExpressionTreeMustHaveDelegate = 835,
        ERR_AnonymousTypeNotAvailable = 836,
        ERR_LambdaInIsAs = 837,
        ERR_ExpressionTreeContainsMultiDimensionalArrayInitializer = 838,
        ERR_MissingArgument = 839,
        //ERR_AutoPropertiesMustHaveBothAccessors = 840,
        ERR_VariableUsedBeforeDeclaration = 841,
        //ERR_ExplicitLayoutAndAutoImplementedProperty = 842,
        ERR_UnassignedThisAutoPropertyUnsupportedVersion = 843,
        ERR_VariableUsedBeforeDeclarationAndHidesField = 844,
        ERR_ExpressionTreeContainsBadCoalesce = 845,
        ERR_ArrayInitializerExpected = 846,
        ERR_ArrayInitializerIncorrectLength = 847,
        // ERR_OverloadRefOutCtor = 851,                                Replaced By ERR_OverloadRefKind
        ERR_ExpressionTreeContainsNamedArgument = 853,
        ERR_ExpressionTreeContainsOptionalArgument = 854,
        ERR_ExpressionTreeContainsIndexedProperty = 855,
        ERR_IndexedPropertyRequiresParams = 856,
        ERR_IndexedPropertyMustHaveAllOptionalParams = 857,
        //ERR_FusionConfigFileNameTooLong = 858,    unused in Roslyn. We give ERR_CantReadConfigFile now.
        // unused 859-1000
        ERR_IdentifierExpected = 1001,
        ERR_SemicolonExpected = 1002,
        ERR_SyntaxError = 1003,
        ERR_DuplicateModifier = 1004,
        ERR_DuplicateAccessor = 1007,
        ERR_IntegralTypeExpected = 1008,
        ERR_IllegalEscape = 1009,
        ERR_NewlineInConst = 1010,
        ERR_EmptyCharConst = 1011,
        ERR_TooManyCharsInConst = 1012,
        ERR_InvalidNumber = 1013,
        ERR_GetOrSetExpected = 1014,
        ERR_ClassTypeExpected = 1015,
        ERR_NamedArgumentExpected = 1016,
        ERR_TooManyCatches = 1017,
        ERR_ThisOrBaseExpected = 1018,
        ERR_OvlUnaryOperatorExpected = 1019,
        ERR_OvlBinaryOperatorExpected = 1020,
        ERR_IntOverflow = 1021,
        ERR_EOFExpected = 1022,
        ERR_BadEmbeddedStmt = 1023,
        ERR_PPDirectiveExpected = 1024,
        ERR_EndOfPPLineExpected = 1025,
        ERR_CloseParenExpected = 1026,
        ERR_EndifDirectiveExpected = 1027,
        ERR_UnexpectedDirective = 1028,
        ERR_ErrorDirective = 1029,
        WRN_WarningDirective = 1030,
        ERR_TypeExpected = 1031,
        ERR_PPDefFollowsToken = 1032,
        //ERR_TooManyLines = 1033,      unused in Roslyn.
        //ERR_LineTooLong = 1034,       unused in Roslyn.
        ERR_OpenEndedComment = 1035,
        ERR_OvlOperatorExpected = 1037,
        ERR_EndRegionDirectiveExpected = 1038,
        ERR_UnterminatedStringLit = 1039,
        ERR_BadDirectivePlacement = 1040,
        ERR_IdentifierExpectedKW = 1041,
        ERR_SemiOrLBraceExpected = 1043,
        ERR_MultiTypeInDeclaration = 1044,
        ERR_AddOrRemoveExpected = 1055,
        ERR_UnexpectedCharacter = 1056,
        ERR_ProtectedInStatic = 1057,
        WRN_UnreachableGeneralCatch = 1058,
        ERR_IncrementLvalueExpected = 1059,
        // WRN_UninitializedField = 1060,  // unused in Roslyn.
        ERR_NoSuchMemberOrExtension = 1061,
        WRN_DeprecatedCollectionInitAddStr = 1062,
        ERR_DeprecatedCollectionInitAddStr = 1063,
        WRN_DeprecatedCollectionInitAdd = 1064,
        ERR_DefaultValueNotAllowed = 1065,
        WRN_DefaultValueForUnconsumedLocation = 1066,
        ERR_PartialWrongTypeParamsVariance = 1067,
        ERR_GlobalSingleTypeNameNotFoundFwd = 1068,
        ERR_DottedTypeNameNotFoundInNSFwd = 1069,
        ERR_SingleTypeNameNotFoundFwd = 1070,
        //ERR_NoSuchMemberOnNoPIAType = 1071,   //EE
        WRN_IdentifierOrNumericLiteralExpected = 1072,
        ERR_UnexpectedToken = 1073,
        // unused 1074-1098
        // ERR_EOLExpected = 1099, // EE
        // ERR_NotSupportedinEE = 1100, // EE
        ERR_BadThisParam = 1100,
        // ERR_BadRefWithThis = 1101, replaced by ERR_BadParameterModifiers
        // ERR_BadOutWithThis = 1102, replaced by ERR_BadParameterModifiers
        ERR_BadTypeforThis = 1103,
        ERR_BadParamModThis = 1104,
        ERR_BadExtensionMeth = 1105,
        ERR_BadExtensionAgg = 1106,
        ERR_DupParamMod = 1107,
        // ERR_MultiParamMod = 1108, replaced by ERR_BadParameterModifiers
        ERR_ExtensionMethodsDecl = 1109,
        ERR_ExtensionAttrNotFound = 1110,
        //ERR_ExtensionTypeParam = 1111,
        ERR_ExplicitExtension = 1112,
        ERR_ValueTypeExtDelegate = 1113,
        // unused 1114-1199
        // Below five error codes are unused.
        // WRN_FeatureDeprecated2 = 1200,
        // WRN_FeatureDeprecated3 = 1201,
        // WRN_FeatureDeprecated4 = 1202,
        // WRN_FeatureDeprecated5 = 1203,
        // WRN_OldWarning_FeatureDefaultDeprecated = 1204,
        // unused 1205-1500
        ERR_BadArgCount = 1501,
        //ERR_BadArgTypes = 1502,
        ERR_BadArgType = 1503,
        ERR_NoSourceFile = 1504,
        ERR_CantRefResource = 1507,
        ERR_ResourceNotUnique = 1508,
        ERR_ImportNonAssembly = 1509,
        ERR_RefLvalueExpected = 1510,
        ERR_BaseInStaticMeth = 1511,
        ERR_BaseInBadContext = 1512,
        ERR_RbraceExpected = 1513,
        ERR_LbraceExpected = 1514,
        ERR_InExpected = 1515,
        ERR_InvalidPreprocExpr = 1517,
        //ERR_BadTokenInType = 1518,    unused in Roslyn
        ERR_InvalidMemberDecl = 1519,
        ERR_MemberNeedsType = 1520,
        ERR_BadBaseType = 1521,
        WRN_EmptySwitch = 1522,
        ERR_ExpectedEndTry = 1524,
        ERR_InvalidExprTerm = 1525,
        ERR_BadNewExpr = 1526,
        ERR_NoNamespacePrivate = 1527,
        ERR_BadVarDecl = 1528,
        ERR_UsingAfterElements = 1529,
        //ERR_NoNewOnNamespaceElement = 1530, EDMAURER we now give BadMemberFlag which is only a little less specific than this.
        //ERR_DontUseInvoke = 1533,
        ERR_BadBinOpArgs = 1534,
        ERR_BadUnOpArgs = 1535,
        ERR_NoVoidParameter = 1536,
        ERR_DuplicateAlias = 1537,
        ERR_BadProtectedAccess = 1540,
        //ERR_CantIncludeDirectory = 1541,
        ERR_AddModuleAssembly = 1542,
        ERR_BindToBogusProp2 = 1545,
        ERR_BindToBogusProp1 = 1546,
        ERR_NoVoidHere = 1547,
        //ERR_CryptoFailed = 1548,
        //ERR_CryptoNotFound = 1549,
        ERR_IndexerNeedsParam = 1551,
        ERR_BadArraySyntax = 1552,
        ERR_BadOperatorSyntax = 1553,
        //ERR_BadOperatorSyntax2 = 1554,    Not used in Roslyn.
        ERR_MainClassNotFound = 1555,
        ERR_MainClassNotClass = 1556,
        //ERR_MainClassWrongFile = 1557,    Not used in Roslyn. This was used only when compiling and producing two outputs.
        ERR_NoMainInClass = 1558,
        //ERR_MainClassIsImport = 1559,     Not used in Roslyn. Scenario occurs so infrequently that it is not worth re-implementing.
        //ERR_FileNameTooLong = 1560,
        //ERR_OutputFileNameTooLong = 1561, Not used in Roslyn. We report a more generic error that doesn't mention "output file" but is fine.
        ERR_OutputNeedsName = 1562,
        //ERR_OutputNeedsInput = 1563,
        ERR_CantHaveWin32ResAndManifest = 1564,
        ERR_CantHaveWin32ResAndIcon = 1565,
        ERR_CantReadResource = 1566,
        //ERR_AutoResGen = 1567,
        ERR_DocFileGen = 1569,
        WRN_XMLParseError = 1570,
        WRN_DuplicateParamTag = 1571,
        WRN_UnmatchedParamTag = 1572,
        WRN_MissingParamTag = 1573,
        WRN_BadXMLRef = 1574,
        ERR_BadStackAllocExpr = 1575,
        ERR_InvalidLineNumber = 1576,
        //ERR_ALinkFailed = 1577,               No alink usage in Roslyn
        ERR_MissingPPFile = 1578,
        ERR_ForEachMissingMember = 1579,
        WRN_BadXMLRefParamType = 1580,
        WRN_BadXMLRefReturnType = 1581,
        ERR_BadWin32Res = 1583,
        WRN_BadXMLRefSyntax = 1584,
        ERR_BadModifierLocation = 1585,
        ERR_MissingArraySize = 1586,
        WRN_UnprocessedXMLComment = 1587,
        //ERR_CantGetCORSystemDir = 1588,
        WRN_FailedInclude = 1589,
        WRN_InvalidInclude = 1590,
        WRN_MissingXMLComment = 1591,
        WRN_XMLParseIncludeError = 1592,
        ERR_BadDelArgCount = 1593,
        //ERR_BadDelArgTypes = 1594,
        // WRN_OldWarning_MultipleTypeDefs = 1595,    // This error code is unused.
        // WRN_OldWarning_DocFileGenAndIncr = 1596,    // This error code is unused.
        ERR_UnexpectedSemicolon = 1597,
        // WRN_XMLParserNotFound = 1598, // No longer used (though, conceivably, we could report it if Linq to Xml is missing at compile time).
        ERR_MethodReturnCantBeRefAny = 1599,
        ERR_CompileCancelled = 1600,
        ERR_MethodArgCantBeRefAny = 1601,
        ERR_AssgReadonlyLocal = 1604,
        ERR_RefReadonlyLocal = 1605,
        //ERR_ALinkCloseFailed = 1606,
        WRN_ALinkWarn = 1607,
        ERR_CantUseRequiredAttribute = 1608,
        ERR_NoModifiersOnAccessor = 1609,
        // WRN_DeleteAutoResFailed = 1610, // Unused.
        ERR_ParamsCantBeWithModifier = 1611,
        ERR_ReturnNotLValue = 1612,
        ERR_MissingCoClass = 1613,
        ERR_AmbiguousAttribute = 1614,
        ERR_BadArgExtraRef = 1615,
        WRN_CmdOptionConflictsSource = 1616,
        ERR_BadCompatMode = 1617,
        ERR_DelegateOnConditional = 1618,
        ERR_CantMakeTempFile = 1619,    //changed to now accept only one argument
        ERR_BadArgRef = 1620,
        ERR_YieldInAnonMeth = 1621,
        ERR_ReturnInIterator = 1622,
        ERR_BadIteratorArgType = 1623,
        ERR_BadIteratorReturn = 1624,
        ERR_BadYieldInFinally = 1625,
        ERR_BadYieldInTryOfCatch = 1626,
        ERR_EmptyYield = 1627,
        ERR_AnonDelegateCantUse = 1628,
        // ERR_IllegalInnerUnsafe = 1629,
        //ERR_BadWatsonMode = 1630,
        ERR_BadYieldInCatch = 1631,
        ERR_BadDelegateLeave = 1632,
        WRN_IllegalPragma = 1633,
        WRN_IllegalPPWarning = 1634,
        WRN_BadRestoreNumber = 1635,
        ERR_VarargsIterator = 1636,
        ERR_UnsafeIteratorArgType = 1637,
        //ERR_ReservedIdentifier = 1638,
        ERR_BadCoClassSig = 1639,
        ERR_MultipleIEnumOfT = 1640,
        ERR_FixedDimsRequired = 1641,
        ERR_FixedNotInStruct = 1642,
        ERR_AnonymousReturnExpected = 1643,
        //ERR_NonECMAFeature = 1644,
        WRN_NonECMAFeature = 1645,
        ERR_ExpectedVerbatimLiteral = 1646,
        //FTL_StackOverflow = 1647,
        ERR_AssgReadonly2 = 1648,
        ERR_RefReadonly2 = 1649,
        ERR_AssgReadonlyStatic2 = 1650,
        ERR_RefReadonlyStatic2 = 1651,
        ERR_AssgReadonlyLocal2Cause = 1654,
        ERR_RefReadonlyLocal2Cause = 1655,
        ERR_AssgReadonlyLocalCause = 1656,
        ERR_RefReadonlyLocalCause = 1657,
        WRN_ErrorOverride = 1658,
        // WRN_OldWarning_ReservedIdentifier = 1659,    // This error code is unused.
        ERR_AnonMethToNonDel = 1660,
        ERR_CantConvAnonMethParams = 1661,
        ERR_CantConvAnonMethReturns = 1662,
        ERR_IllegalFixedType = 1663,
        ERR_FixedOverflow = 1664,
        ERR_InvalidFixedArraySize = 1665,
        ERR_FixedBufferNotFixed = 1666,
        ERR_AttributeNotOnAccessor = 1667,
        WRN_InvalidSearchPathDir = 1668,
        ERR_IllegalVarArgs = 1669,
        ERR_IllegalParams = 1670,
        ERR_BadModifiersOnNamespace = 1671,
        ERR_BadPlatformType = 1672,
        ERR_ThisStructNotInAnonMeth = 1673,
        ERR_NoConvToIDisp = 1674,
        // ERR_InvalidGenericEnum = 1675,    replaced with 7002
        ERR_BadParamRef = 1676,
        ERR_BadParamExtraRef = 1677,
        ERR_BadParamType = 1678, // Requires SymbolDistinguisher.
        ERR_BadExternIdentifier = 1679,
        ERR_AliasMissingFile = 1680,
        ERR_GlobalExternAlias = 1681,
        // WRN_MissingTypeNested = 1682,   // unused in Roslyn.
        // In Roslyn, we generate errors ERR_MissingTypeInSource and ERR_MissingTypeInAssembly instead of warnings WRN_MissingTypeInSource and WRN_MissingTypeInAssembly respectively.
        // WRN_MissingTypeInSource = 1683,
        // WRN_MissingTypeInAssembly = 1684,
        WRN_MultiplePredefTypes = 1685,
        ERR_LocalCantBeFixedAndHoisted = 1686,
        WRN_TooManyLinesForDebugger = 1687,
        ERR_CantConvAnonMethNoParams = 1688,
        ERR_ConditionalOnNonAttributeClass = 1689,
        WRN_CallOnNonAgileField = 1690,
        // WRN_BadWarningNumber = 1691,    // we no longer generate this warning for an unrecognized warning ID specified as an argument to /nowarn or /warnaserror.
        WRN_InvalidNumber = 1692,
        // WRN_FileNameTooLong = 1694, //unused.
        WRN_IllegalPPChecksum = 1695,
        WRN_EndOfPPLineExpected = 1696,
        WRN_ConflictingChecksum = 1697,
        // WRN_AssumedMatchThis = 1698,     // This error code is unused.
        // WRN_UseSwitchInsteadOfAttribute = 1699,     // This error code is unused.
        WRN_InvalidAssemblyName = 1700,
        WRN_UnifyReferenceMajMin = 1701,
        WRN_UnifyReferenceBldRev = 1702,
        ERR_DuplicateImport = 1703,
        ERR_DuplicateImportSimple = 1704,
        ERR_AssemblyMatchBadVersion = 1705,
        //ERR_AnonMethNotAllowed = 1706,            Unused in Roslyn. Previously given when a lambda was supplied as an attribute argument.
        // WRN_DelegateNewMethBind = 1707,             // This error code is unused.
        ERR_FixedNeedsLvalue = 1708,
        // WRN_EmptyFileName = 1709,        // This error code is unused.
        WRN_DuplicateTypeParamTag = 1710,
        WRN_UnmatchedTypeParamTag = 1711,
        WRN_MissingTypeParamTag = 1712,
        //FTL_TypeNameBuilderError = 1713,
        //ERR_ImportBadBase = 1714,                 // This error code is unused and replaced with ERR_NoTypeDef
        ERR_CantChangeTypeOnOverride = 1715,
        ERR_DoNotUseFixedBufferAttr = 1716,
        WRN_AssignmentToSelf = 1717,
        WRN_ComparisonToSelf = 1718,
        ERR_CantOpenWin32Res = 1719,
        WRN_DotOnDefault = 1720,
        ERR_NoMultipleInheritance = 1721,
        ERR_BaseClassMustBeFirst = 1722,
        WRN_BadXMLRefTypeVar = 1723,
        //ERR_InvalidDefaultCharSetValue = 1724,    Not used in Roslyn.
        ERR_FriendAssemblyBadArgs = 1725,
        ERR_FriendAssemblySNReq = 1726,
        //ERR_WatsonSendNotOptedIn = 1727,            We're not doing any custom Watson processing in Roslyn. In modern OSs, Watson behavior is configured with machine policy settings.
        ERR_DelegateOnNullable = 1728,
        ERR_BadCtorArgCount = 1729,
        ERR_GlobalAttributesNotFirst = 1730,
        //ERR_CantConvAnonMethReturnsNoDelegate = 1731,     Not used in Roslyn. When there is no delegate, we reuse the message that contains a substitution string for the delegate type.
        //ERR_ParameterExpected = 1732,             Not used in Roslyn.
        ERR_ExpressionExpected = 1733,
        WRN_UnmatchedParamRefTag = 1734,
        WRN_UnmatchedTypeParamRefTag = 1735,
        ERR_DefaultValueMustBeConstant = 1736,
        ERR_DefaultValueBeforeRequiredValue = 1737,
        ERR_NamedArgumentSpecificationBeforeFixedArgument = 1738,
        ERR_BadNamedArgument = 1739,
        ERR_DuplicateNamedArgument = 1740,
        ERR_RefOutDefaultValue = 1741,
        ERR_NamedArgumentForArray = 1742,
        ERR_DefaultValueForExtensionParameter = 1743,
        ERR_NamedArgumentUsedInPositional = 1744,
        ERR_DefaultValueUsedWithAttributes = 1745,
        ERR_BadNamedArgumentForDelegateInvoke = 1746,
        ERR_NoPIAAssemblyMissingAttribute = 1747,
        ERR_NoCanonicalView = 1748,
        //ERR_TypeNotFoundForNoPIA = 1749,
        ERR_NoConversionForDefaultParam = 1750,
        ERR_DefaultValueForParamsParameter = 1751,
        ERR_NewCoClassOnLink = 1752,
        ERR_NoPIANestedType = 1754,
        //ERR_InvalidTypeIdentifierConstructor = 1755,
        ERR_InteropTypeMissingAttribute = 1756,
        ERR_InteropStructContainsMethods = 1757,
        ERR_InteropTypesWithSameNameAndGuid = 1758,
        ERR_NoPIAAssemblyMissingAttributes = 1759,
        ERR_AssemblySpecifiedForLinkAndRef = 1760,
        ERR_LocalTypeNameClash = 1761,
        WRN_ReferencedAssemblyReferencesLinkedPIA = 1762,
        ERR_NotNullRefDefaultParameter = 1763,
        ERR_FixedLocalInLambda = 1764,
        // WRN_TypeNotFoundForNoPIAWarning = 1765,  // This error code is unused.
        ERR_MissingMethodOnSourceInterface = 1766,
        ERR_MissingSourceInterface = 1767,
        ERR_GenericsUsedInNoPIAType = 1768,
        ERR_GenericsUsedAcrossAssemblies = 1769,
        ERR_NoConversionForNubDefaultParam = 1770,
        //ERR_MemberWithGenericsUsedAcrossAssemblies = 1771,
        //ERR_GenericsUsedInBaseTypeAcrossAssemblies = 1772,
        ERR_InvalidSubsystemVersion = 1773,
        ERR_InteropMethodWithBody = 1774,
        // unused 1775-1899
        ERR_BadWarningLevel = 1900,
        ERR_BadDebugType = 1902,
        //ERR_UnknownTestSwitch = 1903,
        ERR_BadResourceVis = 1906,
        ERR_DefaultValueTypeMustMatch = 1908,
        //ERR_DefaultValueBadParamType = 1909, // Replaced by ERR_DefaultValueBadValueType in Roslyn.
        ERR_DefaultValueBadValueType = 1910,
        ERR_MemberAlreadyInitialized = 1912,
        ERR_MemberCannotBeInitialized = 1913,
        ERR_StaticMemberInObjectInitializer = 1914,
        ERR_ReadonlyValueTypeInObjectInitializer = 1917,
        ERR_ValueTypePropertyInObjectInitializer = 1918,
        ERR_UnsafeTypeInObjectCreation = 1919,
        ERR_EmptyElementInitializer = 1920,
        ERR_InitializerAddHasWrongSignature = 1921,
        ERR_CollectionInitRequiresIEnumerable = 1922,
        //ERR_InvalidCollectionInitializerType = 1925,  unused in Roslyn. Occurs so infrequently in real usage that it is not worth reimplementing.
        ERR_CantOpenWin32Manifest = 1926,
        WRN_CantHaveManifestForModule = 1927,
        //ERR_BadExtensionArgTypes = 1928, unused in Roslyn (replaced by ERR_BadInstanceArgType)
        ERR_BadInstanceArgType = 1929,
        ERR_QueryDuplicateRangeVariable = 1930,
        ERR_QueryRangeVariableOverrides = 1931,
        ERR_QueryRangeVariableAssignedBadValue = 1932,
        //ERR_QueryNotAllowed = 1933,       unused in Roslyn. This specific message is not necessary for correctness and adds little.
        ERR_QueryNoProviderCastable = 1934,
        ERR_QueryNoProviderStandard = 1935,
        ERR_QueryNoProvider = 1936,
        ERR_QueryOuterKey = 1937,
        ERR_QueryInnerKey = 1938,
        ERR_QueryOutRefRangeVariable = 1939,
        ERR_QueryMultipleProviders = 1940,
        ERR_QueryTypeInferenceFailedMulti = 1941,
        ERR_QueryTypeInferenceFailed = 1942,
        ERR_QueryTypeInferenceFailedSelectMany = 1943,
        ERR_ExpressionTreeContainsPointerOp = 1944,
        ERR_ExpressionTreeContainsAnonymousMethod = 1945,
        ERR_AnonymousMethodToExpressionTree = 1946,
        ERR_QueryRangeVariableReadOnly = 1947,
        ERR_QueryRangeVariableSameAsTypeParam = 1948,
        ERR_TypeVarNotFoundRangeVariable = 1949,
        ERR_BadArgTypesForCollectionAdd = 1950,
        ERR_ByRefParameterInExpressionTree = 1951,
        ERR_VarArgsInExpressionTree = 1952,
        // ERR_MemGroupInExpressionTree = 1953, unused in Roslyn (replaced by ERR_LambdaInIsAs)
        ERR_InitializerAddHasParamModifiers = 1954,
        ERR_NonInvocableMemberCalled = 1955,
        WRN_MultipleRuntimeImplementationMatches = 1956,
        WRN_MultipleRuntimeOverrideMatches = 1957,
        ERR_ObjectOrCollectionInitializerWithDelegateCreation = 1958,
        ERR_InvalidConstantDeclarationType = 1959,
        ERR_IllegalVarianceSyntax = 1960,
        ERR_UnexpectedVariance = 1961,
        ERR_BadDynamicTypeof = 1962,
        ERR_ExpressionTreeContainsDynamicOperation = 1963,
        ERR_BadDynamicConversion = 1964,
        ERR_DeriveFromDynamic = 1965,
        ERR_DeriveFromConstructedDynamic = 1966,
        ERR_DynamicTypeAsBound = 1967,
        ERR_ConstructedDynamicTypeAsBound = 1968,
        ERR_DynamicRequiredTypesMissing = 1969,
        ERR_ExplicitDynamicAttr = 1970,
        ERR_NoDynamicPhantomOnBase = 1971,
        ERR_NoDynamicPhantomOnBaseIndexer = 1972,
        ERR_BadArgTypeDynamicExtension = 1973,
        WRN_DynamicDispatchToConditionalMethod = 1974,
        ERR_NoDynamicPhantomOnBaseCtor = 1975,
        ERR_BadDynamicMethodArgMemgrp = 1976,
        ERR_BadDynamicMethodArgLambda = 1977,
        ERR_BadDynamicMethodArg = 1978,
        ERR_BadDynamicQuery = 1979,
        ERR_DynamicAttributeMissing = 1980,
        WRN_IsDynamicIsConfusing = 1981,
        //ERR_DynamicNotAllowedInAttribute = 1982,                    // Replaced by ERR_BadAttributeParamType in Roslyn.
        ERR_BadAsyncReturn = 1983,
        ERR_BadAwaitInFinally = 1984,
        ERR_BadAwaitInCatch = 1985,
        ERR_BadAwaitArg = 1986,
        ERR_BadAsyncArgType = 1988,
        ERR_BadAsyncExpressionTree = 1989,
        //ERR_WindowsRuntimeTypesMissing = 1990, // unused in Roslyn
        ERR_MixingWinRTEventWithRegular = 1991,
        ERR_BadAwaitWithoutAsync = 1992,
        //ERR_MissingAsyncTypes = 1993, // unused in Roslyn
        ERR_BadAsyncLacksBody = 1994,
        ERR_BadAwaitInQuery = 1995,
        ERR_BadAwaitInLock = 1996,
        ERR_TaskRetNoObjectRequired = 1997,
        // WRN_AsyncLacksAwaits = 1998,
        ERR_FileNotFound = 2001,
        WRN_FileAlreadyIncluded = 2002,
        //ERR_DuplicateResponseFile = 2003,
        ERR_NoFileSpec = 2005,
        ERR_SwitchNeedsString = 2006,
        ERR_BadSwitch = 2007,
        WRN_NoSources = 2008,
        ERR_OpenResponseFile = 2011,
        ERR_CantOpenFileWrite = 2012,
        ERR_BadBaseNumber = 2013,
        // WRN_UseNewSwitch = 2014,    //unused.
        ERR_BinaryFile = 2015,
        FTL_BadCodepage = 2016,
        ERR_NoMainOnDLL = 2017,
        //FTL_NoMessagesDLL = 2018,
        FTL_InvalidTarget = 2019,
        //ERR_BadTargetForSecondInputSet = 2020,    Roslyn doesn't support building two binaries at once!
        FTL_InvalidInputFileName = 2021,
        //ERR_NoSourcesInLastInputSet = 2022,       Roslyn doesn't support building two binaries at once!
        WRN_NoConfigNotOnCommandLine = 2023,
        ERR_InvalidFileAlignment = 2024,
        //ERR_NoDebugSwitchSourceMap = 2026,    no sourcemap support in Roslyn.
        //ERR_SourceMapFileBinary = 2027,
        WRN_DefineIdentifierRequired = 2029,
        //ERR_InvalidSourceMap = 2030,
        //ERR_NoSourceMapFile = 2031,
        //ERR_IllegalOptionChar = 2032,
        FTL_OutputFileExists = 2033,
        ERR_OneAliasPerReference = 2034,
        ERR_SwitchNeedsNumber = 2035,
        ERR_MissingDebugSwitch = 2036,
        ERR_ComRefCallInExpressionTree = 2037,
        WRN_BadUILang = 2038,
        ERR_InvalidFormatForGuidForOption = 2039,
        ERR_MissingGuidForOption = 2040,
        ERR_InvalidOutputName = 2041,
        ERR_InvalidDebugInformationFormat = 2042,
        ERR_LegacyObjectIdSyntax = 2043,
        ERR_SourceLinkRequiresPdb = 2044,
        ERR_CannotEmbedWithoutPdb = 2045,
        ERR_BadSwitchValue = 2046,
        // unused 2047-2999
        WRN_CLS_NoVarArgs = 3000,
        WRN_CLS_BadArgType = 3001, // Requires SymbolDistinguisher.
        WRN_CLS_BadReturnType = 3002,
        WRN_CLS_BadFieldPropType = 3003,
        // WRN_CLS_BadUnicode = 3004, //unused
        WRN_CLS_BadIdentifierCase = 3005,
        WRN_CLS_OverloadRefOut = 3006,
        WRN_CLS_OverloadUnnamed = 3007,
        WRN_CLS_BadIdentifier = 3008,
        WRN_CLS_BadBase = 3009,
        WRN_CLS_BadInterfaceMember = 3010,
        WRN_CLS_NoAbstractMembers = 3011,
        WRN_CLS_NotOnModules = 3012,
        WRN_CLS_ModuleMissingCLS = 3013,
        WRN_CLS_AssemblyNotCLS = 3014,
        WRN_CLS_BadAttributeType = 3015,
        WRN_CLS_ArrayArgumentToAttribute = 3016,
        WRN_CLS_NotOnModules2 = 3017,
        WRN_CLS_IllegalTrueInFalse = 3018,
        WRN_CLS_MeaninglessOnPrivateType = 3019,
        WRN_CLS_AssemblyNotCLS2 = 3021,
        WRN_CLS_MeaninglessOnParam = 3022,
        WRN_CLS_MeaninglessOnReturn = 3023,
        WRN_CLS_BadTypeVar = 3024,
        WRN_CLS_VolatileField = 3026,
        WRN_CLS_BadInterface = 3027,
        FTL_BadChecksumAlgorithm = 3028,
        #endregion diagnostics introduced in C# 4 and earlier

        // unused 3029-3999

        #region diagnostics introduced in C# 5
        // 4000 unused
        ERR_BadAwaitArgIntrinsic = 4001,
        // 4002 unused
        ERR_BadAwaitAsIdentifier = 4003,
        ERR_AwaitInUnsafeContext = 4004,
        ERR_UnsafeAsyncArgType = 4005,
        ERR_VarargsAsync = 4006,
        ERR_ByRefTypeAndAwait = 4007,
        ERR_BadAwaitArgVoidCall = 4008,
        ERR_NonTaskMainCantBeAsync = 4009,
        ERR_CantConvAsyncAnonFuncReturns = 4010,
        ERR_BadAwaiterPattern = 4011,
        ERR_BadSpecialByRefParameter = 4012,
        ERR_SpecialByRefInLambda = 4013,
        WRN_UnobservedAwaitableExpression = 4014,
        ERR_SynchronizedAsyncMethod = 4015,
        ERR_BadAsyncReturnExpression = 4016,
        ERR_NoConversionForCallerLineNumberParam = 4017,
        ERR_NoConversionForCallerFilePathParam = 4018,
        ERR_NoConversionForCallerMemberNameParam = 4019,
        ERR_BadCallerLineNumberParamWithoutDefaultValue = 4020,
        ERR_BadCallerFilePathParamWithoutDefaultValue = 4021,
        ERR_BadCallerMemberNameParamWithoutDefaultValue = 4022,
        ERR_BadPrefer32OnLib = 4023,
        WRN_CallerLineNumberParamForUnconsumedLocation = 4024,
        WRN_CallerFilePathParamForUnconsumedLocation = 4025,
        WRN_CallerMemberNameParamForUnconsumedLocation = 4026,
        ERR_DoesntImplementAwaitInterface = 4027,
        ERR_BadAwaitArg_NeedSystem = 4028,
        ERR_CantReturnVoid = 4029,
        ERR_SecurityCriticalOrSecuritySafeCriticalOnAsync = 4030,
        ERR_SecurityCriticalOrSecuritySafeCriticalOnAsyncInClassOrStruct = 4031,
        ERR_BadAwaitWithoutAsyncMethod = 4032,
        ERR_BadAwaitWithoutVoidAsyncMethod = 4033,
        ERR_BadAwaitWithoutAsyncLambda = 4034,
        // ERR_BadAwaitWithoutAsyncAnonMeth = 4035,         Merged with ERR_BadAwaitWithoutAsyncLambda in Roslyn
        ERR_NoSuchMemberOrExtensionNeedUsing = 4036,
        #endregion diagnostics introduced in C# 5

        // unused 4037-4999

        #region diagnostics introduced in C# 6
        // WRN_UnknownOption = 5000,   //unused in Roslyn
        ERR_NoEntryPoint = 5001,

        // huge gap here; available 5002-6999

        ERR_UnexpectedAliasedName = 7000,
        ERR_UnexpectedGenericName = 7002,
        ERR_UnexpectedUnboundGenericName = 7003,
        ERR_GlobalStatement = 7006,
        ERR_BadUsingType = 7007,
        ERR_ReservedAssemblyName = 7008,
        ERR_PPReferenceFollowsToken = 7009,
        ERR_ExpectedPPFile = 7010,
        ERR_ReferenceDirectiveOnlyAllowedInScripts = 7011,
        ERR_NameNotInContextPossibleMissingReference = 7012,
        ERR_MetadataNameTooLong = 7013,
        ERR_AttributesNotAllowed = 7014,
        ERR_ExternAliasNotAllowed = 7015,
        ERR_ConflictingAliasAndDefinition = 7016,
        ERR_GlobalDefinitionOrStatementExpected = 7017,
        ERR_ExpectedSingleScript = 7018,
        ERR_RecursivelyTypedVariable = 7019,
        ERR_YieldNotAllowedInScript = 7020,
        ERR_NamespaceNotAllowedInScript = 7021,
        WRN_MainIgnored = 7022,
        WRN_StaticInAsOrIs = 7023,
        ERR_InvalidDelegateType = 7024,
        ERR_BadVisEventType = 7025,
        ERR_GlobalAttributesNotAllowed = 7026,
        ERR_PublicKeyFileFailure = 7027,
        ERR_PublicKeyContainerFailure = 7028,
        ERR_FriendRefSigningMismatch = 7029,
        ERR_CannotPassNullForFriendAssembly = 7030,
        ERR_SignButNoPrivateKey = 7032,
        WRN_DelaySignButNoKey = 7033,
        ERR_InvalidVersionFormat = 7034,
        WRN_InvalidVersionFormat = 7035,
        ERR_NoCorrespondingArgument = 7036,
        // Moot: WRN_DestructorIsNotFinalizer = 7037,
        ERR_ModuleEmitFailure = 7038,
        // ERR_NameIllegallyOverrides2 = 7039, // Not used anymore due to 'Single Meaning' relaxation changes
        // ERR_NameIllegallyOverrides3 = 7040, // Not used anymore due to 'Single Meaning' relaxation changes
        ERR_ResourceFileNameNotUnique = 7041,
        ERR_DllImportOnGenericMethod = 7042,
        ERR_EncUpdateFailedMissingSymbol = 7043,

        ERR_ParameterNotValidForType = 7045,
        ERR_AttributeParameterRequired1 = 7046,
        ERR_AttributeParameterRequired2 = 7047,
        ERR_SecurityAttributeMissingAction = 7048,
        ERR_SecurityAttributeInvalidAction = 7049,
        ERR_SecurityAttributeInvalidActionAssembly = 7050,
        ERR_SecurityAttributeInvalidActionTypeOrMethod = 7051,
        ERR_PrincipalPermissionInvalidAction = 7052,
        ERR_FeatureNotValidInExpressionTree = 7053,
        ERR_MarshalUnmanagedTypeNotValidForFields = 7054,
        ERR_MarshalUnmanagedTypeOnlyValidForFields = 7055,
        ERR_PermissionSetAttributeInvalidFile = 7056,
        ERR_PermissionSetAttributeFileReadError = 7057,
        ERR_InvalidVersionFormat2 = 7058,
        ERR_InvalidAssemblyCultureForExe = 7059,
        //ERR_AsyncBeforeVersionFive = 7060,
        ERR_DuplicateAttributeInNetModule = 7061,
        //WRN_PDBConstantStringValueTooLong = 7063,     gave up on this warning
        ERR_CantOpenIcon = 7064,
        ERR_ErrorBuildingWin32Resources = 7065,
        // ERR_IteratorInInteractive = 7066,
        ERR_BadAttributeParamDefaultArgument = 7067,
        ERR_MissingTypeInSource = 7068,
        ERR_MissingTypeInAssembly = 7069,
        ERR_SecurityAttributeInvalidTarget = 7070,
        ERR_InvalidAssemblyName = 7071,
        //ERR_PartialTypesBeforeVersionTwo = 7072,
        //ERR_PartialMethodsBeforeVersionThree = 7073,
        //ERR_QueryBeforeVersionThree = 7074,
        //ERR_AnonymousTypeBeforeVersionThree = 7075,
        //ERR_ImplicitArrayBeforeVersionThree = 7076,
        //ERR_ObjectInitializerBeforeVersionThree = 7077,
        //ERR_LambdaBeforeVersionThree = 7078,
        ERR_NoTypeDefFromModule = 7079,
        WRN_CallerFilePathPreferredOverCallerMemberName = 7080,
        WRN_CallerLineNumberPreferredOverCallerMemberName = 7081,
        WRN_CallerLineNumberPreferredOverCallerFilePath = 7082,
        ERR_InvalidDynamicCondition = 7083,
        ERR_WinRtEventPassedByRef = 7084,
        //ERR_ByRefReturnUnsupported = 7085,
        ERR_NetModuleNameMismatch = 7086,
        ERR_BadModuleName = 7087,
        ERR_BadCompilationOptionValue = 7088,
        ERR_BadAppConfigPath = 7089,
        WRN_AssemblyAttributeFromModuleIsOverridden = 7090,
        ERR_CmdOptionConflictsSource = 7091,
        ERR_FixedBufferTooManyDimensions = 7092,
        ERR_CantReadConfigFile = 7093,
        ERR_BadAwaitInCatchFilter = 7094,
        WRN_FilterIsConstantTrue = 7095,
        ERR_EncNoPIAReference = 7096,
        //ERR_EncNoDynamicOperation = 7097,   // dynamic operations are now allowed
        ERR_LinkedNetmoduleMetadataMustProvideFullPEImage = 7098,
        ERR_MetadataReferencesNotSupported = 7099,
        ERR_InvalidAssemblyCulture = 7100,
        ERR_EncReferenceToAddedMember = 7101,
        ERR_MutuallyExclusiveOptions = 7102,
        ERR_InvalidDebugInfo = 7103,
        #endregion diagnostics introduced in C# 6

        // unused 7104-8000

        #region more diagnostics introduced in Roslyn (C# 6)
        WRN_UnimplementedCommandLineSwitch = 8001,
        WRN_ReferencedAssemblyDoesNotHaveStrongName = 8002,
        ERR_InvalidSignaturePublicKey = 8003,
        ERR_ExportedTypeConflictsWithDeclaration = 8004,
        ERR_ExportedTypesConflict = 8005,
        ERR_ForwardedTypeConflictsWithDeclaration = 8006,
        ERR_ForwardedTypesConflict = 8007,
        ERR_ForwardedTypeConflictsWithExportedType = 8008,
        WRN_RefCultureMismatch = 8009,
        ERR_AgnosticToMachineModule = 8010,
        ERR_ConflictingMachineModule = 8011,
        WRN_ConflictingMachineAssembly = 8012,
        ERR_CryptoHashFailed = 8013,
        ERR_MissingNetModuleReference = 8014,
        ERR_NetModuleNameMustBeUnique = 8015,
        ERR_UnsupportedTransparentIdentifierAccess = 8016,
        ERR_ParamDefaultValueDiffersFromAttribute = 8017,
        WRN_UnqualifiedNestedTypeInCref = 8018,
        HDN_UnusedUsingDirective = 8019,
        HDN_UnusedExternAlias = 8020,
        WRN_NoRuntimeMetadataVersion = 8021,
        ERR_FeatureNotAvailableInVersion1 = 8022,        // Note: one per version to make telemetry easier
        ERR_FeatureNotAvailableInVersion2 = 8023,
        ERR_FeatureNotAvailableInVersion3 = 8024,
        ERR_FeatureNotAvailableInVersion4 = 8025,
        ERR_FeatureNotAvailableInVersion5 = 8026,
        // ERR_FeatureNotAvailableInVersion6 is below
        ERR_FieldHasMultipleDistinctConstantValues = 8027,
        ERR_ComImportWithInitializers = 8028,
        WRN_PdbLocalNameTooLong = 8029,
        ERR_RetNoObjectRequiredLambda = 8030,
        ERR_TaskRetNoObjectRequiredLambda = 8031,
        WRN_AnalyzerCannotBeCreated = 8032,
        WRN_NoAnalyzerInAssembly = 8033,
        WRN_UnableToLoadAnalyzer = 8034,
        ERR_CantReadRulesetFile = 8035,
        ERR_BadPdbData = 8036,
        // available 8037-8039
        INF_UnableToLoadSomeTypesInAnalyzer = 8040,
        // available 8041-8049
        ERR_InitializerOnNonAutoProperty = 8050,
        ERR_AutoPropertyMustHaveGetAccessor = 8051,
        // ERR_AutoPropertyInitializerInInterface = 8052,
        ERR_InstancePropertyInitializerInInterface = 8053,
        ERR_EnumsCantContainDefaultConstructor = 8054,
        ERR_EncodinglessSyntaxTree = 8055,
        // ERR_AccessorListAndExpressionBody = 8056, Deprecated in favor of ERR_BlockBodyAndExpressionBody
        ERR_BlockBodyAndExpressionBody = 8057,
        ERR_FeatureIsExperimental = 8058,
        ERR_FeatureNotAvailableInVersion6 = 8059,
        // available 8062-8069
        ERR_SwitchFallOut = 8070,
        // available = 8071,
        ERR_NullPropagatingOpInExpressionTree = 8072,
        WRN_NubExprIsConstBool2 = 8073,
        ERR_DictionaryInitializerInExpressionTree = 8074,
        ERR_ExtensionCollectionElementInitializerInExpressionTree = 8075,
        ERR_UnclosedExpressionHole = 8076,
        // This is now handled by the single ERR_NewlinesAreNotAllowedInsideANonVerbatimInterpolatedString error.
        // ERR_SingleLineCommentInExpressionHole = 8077,
        ERR_InsufficientStack = 8078,
        ERR_UseDefViolationProperty = 8079,
        ERR_AutoPropertyMustOverrideSet = 8080,
        ERR_ExpressionHasNoName = 8081,
        ERR_SubexpressionNotInNameof = 8082,
        ERR_AliasQualifiedNameNotAnExpression = 8083,
        ERR_NameofMethodGroupWithTypeParameters = 8084,
        ERR_NoAliasHere = 8085,
        ERR_UnescapedCurly = 8086,
        ERR_EscapedCurly = 8087,
        ERR_TrailingWhitespaceInFormatSpecifier = 8088,
        ERR_EmptyFormatSpecifier = 8089,
        ERR_ErrorInReferencedAssembly = 8090,
        ERR_ExternHasConstructorInitializer = 8091,
        ERR_ExpressionOrDeclarationExpected = 8092,
        ERR_NameofExtensionMethod = 8093,
        WRN_AlignmentMagnitude = 8094,
        ERR_ConstantStringTooLong = 8095,
        ERR_DebugEntryPointNotSourceMethodDefinition = 8096,
        ERR_LoadDirectiveOnlyAllowedInScripts = 8097,
        ERR_PPLoadFollowsToken = 8098,
        ERR_SourceFileReferencesNotSupported = 8099,
        ERR_BadAwaitInStaticVariableInitializer = 8100,
        ERR_InvalidPathMap = 8101,
        ERR_PublicSignButNoKey = 8102,
        ERR_TooManyUserStrings = 8103,
        ERR_PeWritingFailure = 8104,
        #endregion diagnostics introduced in Roslyn (C# 6)

        #region diagnostics introduced in C# 6 updates
        WRN_AttributeIgnoredWhenPublicSigning = 8105,
        ERR_OptionMustBeAbsolutePath = 8106,
        #endregion diagnostics introduced in C# 6 updates

        ERR_FeatureNotAvailableInVersion7 = 8107,

        #region diagnostics for local functions introduced in C# 7
        ERR_DynamicLocalFunctionParamsParameter = 8108,
        ERR_ExpressionTreeContainsLocalFunction = 8110,
        #endregion diagnostics for local functions introduced in C# 7

        #region diagnostics for instrumentation

        ERR_InvalidInstrumentationKind = 8111,

        #endregion

        ERR_LocalFunctionMissingBody = 8112,
        ERR_InvalidHashAlgorithmName = 8113,

        // Unused 8113, 8114, 8115

        #region diagnostics for pattern-matching introduced in C# 7
        ERR_ThrowMisplaced = 8115,
        ERR_PatternNullableType = 8116,
        ERR_BadPatternExpression = 8117,
        ERR_SwitchExpressionValueExpected = 8119,
        ERR_SwitchCaseSubsumed = 8120,
        ERR_PatternWrongType = 8121,
        ERR_ExpressionTreeContainsIsMatch = 8122,
        #endregion diagnostics for pattern-matching introduced in C# 7

        #region tuple diagnostics introduced in C# 7
        WRN_TupleLiteralNameMismatch = 8123,
        ERR_TupleTooFewElements = 8124,
        ERR_TupleReservedElementName = 8125,
        ERR_TupleReservedElementNameAnyPosition = 8126,
        ERR_TupleDuplicateElementName = 8127,
        ERR_PredefinedTypeMemberNotFoundInAssembly = 8128,
        ERR_MissingDeconstruct = 8129,
        ERR_TypeInferenceFailedForImplicitlyTypedDeconstructionVariable = 8130,
        ERR_DeconstructRequiresExpression = 8131,
        ERR_DeconstructWrongCardinality = 8132,
        ERR_CannotDeconstructDynamic = 8133,
        ERR_DeconstructTooFewElements = 8134,
        ERR_ConversionNotTupleCompatible = 8135,
        ERR_DeconstructionVarFormDisallowsSpecificType = 8136,
        ERR_TupleElementNamesAttributeMissing = 8137,
        ERR_ExplicitTupleElementNamesAttribute = 8138,
        ERR_CantChangeTupleNamesOnOverride = 8139,
        ERR_DuplicateInterfaceWithTupleNamesInBaseList = 8140,
        ERR_ImplBadTupleNames = 8141,
        ERR_PartialMemberInconsistentTupleNames = 8142,
        ERR_ExpressionTreeContainsTupleLiteral = 8143,
        ERR_ExpressionTreeContainsTupleConversion = 8144,
        #endregion tuple diagnostics introduced in C# 7

        #region diagnostics for ref locals and ref returns introduced in C# 7
        ERR_AutoPropertyCannotBeRefReturning = 8145,
        ERR_RefPropertyMustHaveGetAccessor = 8146,
        ERR_RefPropertyCannotHaveSetAccessor = 8147,
        ERR_CantChangeRefReturnOnOverride = 8148,
        ERR_MustNotHaveRefReturn = 8149,
        ERR_MustHaveRefReturn = 8150,
        ERR_RefReturnMustHaveIdentityConversion = 8151,
        ERR_CloseUnimplementedInterfaceMemberWrongRefReturn = 8152,
        ERR_RefReturningCallInExpressionTree = 8153,
        ERR_BadIteratorReturnRef = 8154,
        ERR_BadRefReturnExpressionTree = 8155,
        ERR_RefReturnLvalueExpected = 8156,
        ERR_RefReturnNonreturnableLocal = 8157,
        ERR_RefReturnNonreturnableLocal2 = 8158,
        ERR_RefReturnRangeVariable = 8159,
        ERR_RefReturnReadonly = 8160,
        ERR_RefReturnReadonlyStatic = 8161,
        ERR_RefReturnReadonly2 = 8162,
        ERR_RefReturnReadonlyStatic2 = 8163,
        // ERR_RefReturnCall = 8164,                we use more general ERR_EscapeCall now
        // ERR_RefReturnCall2 = 8165,               we use more general ERR_EscapeCall2 now
        ERR_RefReturnParameter = 8166,
        ERR_RefReturnParameter2 = 8167,
        ERR_RefReturnLocal = 8168,
        ERR_RefReturnLocal2 = 8169,
        ERR_RefReturnStructThis = 8170,
        ERR_InitializeByValueVariableWithReference = 8171,
        ERR_InitializeByReferenceVariableWithValue = 8172,
        ERR_RefAssignmentMustHaveIdentityConversion = 8173,
        ERR_ByReferenceVariableMustBeInitialized = 8174,
        ERR_AnonDelegateCantUseLocal = 8175,
        // ERR_BadIteratorLocalType = 8176,
        // ERR_BadAsyncLocalType = 8177,
        ERR_RefReturningCallAndAwait = 8178,
        #endregion diagnostics for ref locals and ref returns introduced in C# 7

        #region stragglers for C# 7
        ERR_PredefinedValueTupleTypeNotFound = 8179, // We need a specific error code for ValueTuple as an IDE codefix depends on it (AddNuget)
        ERR_SemiOrLBraceOrArrowExpected = 8180,
        ERR_NewWithTupleTypeSyntax = 8181,
        ERR_PredefinedValueTupleTypeMustBeStruct = 8182,
        ERR_DiscardTypeInferenceFailed = 8183,
        // ERR_MixedDeconstructionUnsupported = 8184,
        ERR_DeclarationExpressionNotPermitted = 8185,
        ERR_MustDeclareForeachIteration = 8186,
        ERR_TupleElementNamesInDeconstruction = 8187,
        ERR_ExpressionTreeContainsThrowExpression = 8188,
        ERR_DelegateRefMismatch = 8189,
        #endregion stragglers for C# 7

        #region diagnostics for parse options
        ERR_BadSourceCodeKind = 8190,
        ERR_BadDocumentationMode = 8191,
        ERR_BadLanguageVersion = 8192,
        #endregion

        // Unused 8193-8195

        #region diagnostics for out var
        ERR_ImplicitlyTypedVariableUsedInForbiddenZone = 8196,
        ERR_TypeInferenceFailedForImplicitlyTypedOutVariable = 8197,
        ERR_ExpressionTreeContainsOutVariable = 8198,
        #endregion diagnostics for out var

        #region more stragglers for C# 7
        ERR_VarInvocationLvalueReserved = 8199,
        //ERR_ExpressionVariableInConstructorOrFieldInitializer = 8200,
        //ERR_ExpressionVariableInQueryClause = 8201,
        ERR_PublicSignNetModule = 8202,
        ERR_BadAssemblyName = 8203,
        ERR_BadAsyncMethodBuilderTaskProperty = 8204,
        // ERR_AttributesInLocalFuncDecl = 8205,
        ERR_TypeForwardedToMultipleAssemblies = 8206,
        ERR_ExpressionTreeContainsDiscard = 8207,
        ERR_PatternDynamicType = 8208,
        ERR_VoidAssignment = 8209,
        ERR_VoidInTuple = 8210,
        #endregion more stragglers for C# 7

        #region diagnostics introduced for C# 7.1

        ERR_Merge_conflict_marker_encountered = 8300,
        ERR_InvalidPreprocessingSymbol = 8301,
        ERR_FeatureNotAvailableInVersion7_1 = 8302,
        ERR_LanguageVersionCannotHaveLeadingZeroes = 8303,
        ERR_CompilerAndLanguageVersion = 8304,
        WRN_WindowsExperimental = 8305,
        ERR_TupleInferredNamesNotAvailable = 8306,
        ERR_TypelessTupleInAs = 8307,

        ERR_NoRefOutWhenRefOnly = 8308,
        ERR_NoNetModuleOutputWhenRefOutOrRefOnly = 8309,
        ERR_BadOpOnNullOrDefaultOrNew = 8310,
        // ERR_BadDynamicMethodArgDefaultLiteral = 8311,
        ERR_DefaultLiteralNotValid = 8312,
        // ERR_DefaultInSwitch = 8313,
        ERR_PatternWrongGenericTypeInVersion = 8314,
        ERR_AmbigBinaryOpsOnDefault = 8315,

        #endregion diagnostics introduced for C# 7.1

        #region diagnostics introduced for C# 7.2
        ERR_FeatureNotAvailableInVersion7_2 = 8320,
        WRN_UnreferencedLocalFunction = 8321,
        ERR_DynamicLocalFunctionTypeParameter = 8322,
        ERR_BadNonTrailingNamedArgument = 8323,
        ERR_NamedArgumentSpecificationBeforeFixedArgumentInDynamicInvocation = 8324,
        #endregion diagnostics introduced for C# 7.2

        #region diagnostics introduced for `ref readonly`, `ref conditional` and `ref-like` features in C# 7.2
        ERR_RefConditionalAndAwait = 8325,
        ERR_RefConditionalNeedsTwoRefs = 8326,
        ERR_RefConditionalDifferentTypes = 8327,
        ERR_BadParameterModifiers = 8328,

        ERR_RefReadonlyNotField = 8329,
        ERR_RefReadonlyNotField2 = 8330,
        ERR_AssignReadonlyNotField = 8331,
        ERR_AssignReadonlyNotField2 = 8332,
        ERR_RefReturnReadonlyNotField = 8333,
        ERR_RefReturnReadonlyNotField2 = 8334,
        ERR_ExplicitReservedAttr = 8335,
        ERR_TypeReserved = 8336,
        ERR_RefExtensionMustBeValueTypeOrConstrainedToOne = 8337,
        ERR_InExtensionMustBeValueType = 8338,
        // ERR_BadParameterModifiersOrder = 8339,

        ERR_FieldsInRoStruct = 8340,
        ERR_AutoPropsInRoStruct = 8341,
        ERR_FieldlikeEventsInRoStruct = 8342,
        // ERR_RefStructInterfaceImpl = 8343,
        // ERR_BadSpecialByRefIterator = 8344,
        ERR_FieldAutoPropCantBeByRefLike = 8345,
        ERR_StackAllocConversionNotPossible = 8346,

        ERR_EscapeCall = 8347,
        ERR_EscapeCall2 = 8348,
        ERR_EscapeOther = 8349,
        ERR_CallArgMixing = 8350,
        ERR_MismatchedRefEscapeInTernary = 8351,
        ERR_EscapeVariable = 8352,
        ERR_EscapeStackAlloc = 8353,
        ERR_RefReturnThis = 8354,
        ERR_OutAttrOnInParam = 8355,
        #endregion diagnostics introduced for `ref readonly`, `ref conditional` and `ref-like` features in C# 7.2

        ERR_PredefinedTypeAmbiguous = 8356,
        ERR_InvalidVersionFormatDeterministic = 8357,
        ERR_AttributeCtorInParameter = 8358,

        #region diagnostics for FilterIsConstant warning message fix
        WRN_FilterIsConstantFalse = 8359,
        WRN_FilterIsConstantFalseRedundantTryCatch = 8360,
        #endregion diagnostics for FilterIsConstant warning message fix

        ERR_ConditionalInInterpolation = 8361,
        ERR_CantUseVoidInArglist = 8362,
        ERR_InDynamicMethodArg = 8364,

        #region diagnostics introduced for C# 7.3
        ERR_FeatureNotAvailableInVersion7_3 = 8370,
        WRN_AttributesOnBackingFieldsNotAvailable = 8371,
        ERR_DoNotUseFixedBufferAttrOnProperty = 8372,
        ERR_RefLocalOrParamExpected = 8373,
        ERR_RefAssignNarrower = 8374,

        ERR_NewBoundWithUnmanaged = 8375,
        //ERR_UnmanagedConstraintMustBeFirst = 8376,
        ERR_UnmanagedConstraintNotSatisfied = 8377,
        ERR_CantUseInOrOutInArglist = 8378,
        ERR_ConWithUnmanagedCon = 8379,
        ERR_UnmanagedBoundWithClass = 8380,

        ERR_InvalidStackAllocArray = 8381,

        ERR_ExpressionTreeContainsTupleBinOp = 8382,
        WRN_TupleBinopLiteralNameMismatch = 8383,
        ERR_TupleSizesMismatchForBinOps = 8384,
        ERR_ExprCannotBeFixed = 8385,
        ERR_InvalidObjectCreation = 8386,
        #endregion diagnostics introduced for C# 7.3

        WRN_TypeParameterSameAsOuterMethodTypeParameter = 8387,
        ERR_OutVariableCannotBeByRef = 8388,
        ERR_OmittedTypeArgument = 8389,

        #region diagnostics introduced for C# 8.0
        ERR_FeatureNotAvailableInVersion8 = 8400,
        ERR_AltInterpolatedVerbatimStringsNotAvailable = 8401,
        // Unused 8402
        ERR_IteratorMustBeAsync = 8403,

        ERR_NoConvToIAsyncDisp = 8410,
        ERR_AwaitForEachMissingMember = 8411,
        ERR_BadGetAsyncEnumerator = 8412,
        ERR_MultipleIAsyncEnumOfT = 8413,
        ERR_ForEachMissingMemberWrongAsync = 8414,
        ERR_AwaitForEachMissingMemberWrongAsync = 8415,
        ERR_BadDynamicAwaitForEach = 8416,
        ERR_NoConvToIAsyncDispWrongAsync = 8417,
        ERR_NoConvToIDispWrongAsync = 8418,
        ERR_PossibleAsyncIteratorWithoutYield = 8419,
        ERR_PossibleAsyncIteratorWithoutYieldOrAwait = 8420,
        ERR_StaticLocalFunctionCannotCaptureVariable = 8421,
        ERR_StaticLocalFunctionCannotCaptureThis = 8422,
        ERR_AttributeNotOnEventAccessor = 8423,
        WRN_UnconsumedEnumeratorCancellationAttributeUsage = 8424,
        WRN_UndecoratedCancellationTokenParameter = 8425,
        ERR_MultipleEnumeratorCancellationAttributes = 8426,
        ERR_VarianceInterfaceNesting = 8427,
        ERR_ImplicitIndexIndexerWithName = 8428,
        ERR_ImplicitRangeIndexerWithName = 8429,
        // available range

        WRN_ManagedAddr = 8500,
        // available range

        #region diagnostics introduced for recursive patterns
        ERR_WrongNumberOfSubpatterns = 8502,
        ERR_PropertyPatternNameMissing = 8503,
        ERR_MissingPattern = 8504,
        ERR_DefaultPattern = 8505,
        ERR_SwitchExpressionNoBestType = 8506,
        // ERR_SingleElementPositionalPatternRequiresDisambiguation = 8507, // Retired C# 8 diagnostic
        ERR_VarMayNotBindToType = 8508,
        WRN_SwitchExpressionNotExhaustive = 8509,
        ERR_SwitchArmSubsumed = 8510,
        ERR_ConstantPatternVsOpenType = 8511,
        WRN_CaseConstantNamedUnderscore = 8512,
        WRN_IsTypeNamedUnderscore = 8513,
        ERR_ExpressionTreeContainsSwitchExpression = 8514,
        ERR_SwitchGoverningExpressionRequiresParens = 8515,
        ERR_TupleElementNameMismatch = 8516,
        ERR_DeconstructParameterNameMismatch = 8517,
        ERR_IsPatternImpossible = 8518,
        WRN_GivenExpressionNeverMatchesPattern = 8519,
        WRN_GivenExpressionAlwaysMatchesConstant = 8520,
        ERR_PointerTypeInPatternMatching = 8521,
        ERR_ArgumentNameInITuplePattern = 8522,
        ERR_DiscardPatternInSwitchStatement = 8523,
        WRN_SwitchExpressionNotExhaustiveWithUnnamedEnumValue = 8524,
        ERR_DesignatorBeforePropertyPattern = 8525,
        // available 8526-8596
        #endregion diagnostics introduced for recursive patterns

        WRN_ThrowPossibleNull = 8597,
        ERR_IllegalSuppression = 8598,
        // available 8599,
        WRN_ConvertingNullableToNonNullable = 8600,
        WRN_NullReferenceAssignment = 8601,
        WRN_NullReferenceReceiver = 8602,
        WRN_NullReferenceReturn = 8603,
        WRN_NullReferenceArgument = 8604,
        WRN_UnboxPossibleNull = 8605,
        // WRN_NullReferenceIterationVariable = 8606 (unavailable, may be used in warning suppressions in early C# 8.0 code)
        WRN_DisallowNullAttributeForbidsMaybeNullAssignment = 8607,
        WRN_NullabilityMismatchInTypeOnOverride = 8608,
        WRN_NullabilityMismatchInReturnTypeOnOverride = 8609,
        WRN_NullabilityMismatchInParameterTypeOnOverride = 8610,
        WRN_NullabilityMismatchInParameterTypeOnPartial = 8611,
        WRN_NullabilityMismatchInTypeOnImplicitImplementation = 8612,
        WRN_NullabilityMismatchInReturnTypeOnImplicitImplementation = 8613,
        WRN_NullabilityMismatchInParameterTypeOnImplicitImplementation = 8614,
        WRN_NullabilityMismatchInTypeOnExplicitImplementation = 8615,
        WRN_NullabilityMismatchInReturnTypeOnExplicitImplementation = 8616,
        WRN_NullabilityMismatchInParameterTypeOnExplicitImplementation = 8617,
        WRN_UninitializedNonNullableField = 8618,
        WRN_NullabilityMismatchInAssignment = 8619,
        WRN_NullabilityMismatchInArgument = 8620,
        WRN_NullabilityMismatchInReturnTypeOfTargetDelegate = 8621,
        WRN_NullabilityMismatchInParameterTypeOfTargetDelegate = 8622,
        ERR_ExplicitNullableAttribute = 8623,
        WRN_NullabilityMismatchInArgumentForOutput = 8624,
        WRN_NullAsNonNullable = 8625,
        //WRN_AsOperatorMayReturnNull = 8626,
        ERR_NullableUnconstrainedTypeParameter = 8627,
        ERR_AnnotationDisallowedInObjectCreation = 8628,
        WRN_NullableValueTypeMayBeNull = 8629,
        ERR_CompilationOptionNotAvailable = 8630,
        WRN_NullabilityMismatchInTypeParameterConstraint = 8631,
        WRN_MissingNonNullTypesContextForAnnotation = 8632,
        WRN_NullabilityMismatchInConstraintsOnImplicitImplementation = 8633,
        WRN_NullabilityMismatchInTypeParameterReferenceTypeConstraint = 8634,
        ERR_TripleDotNotAllowed = 8635,
        ERR_BadNullableContextOption = 8636,
        ERR_NullableDirectiveQualifierExpected = 8637,
        //WRN_ConditionalAccessMayReturnNull = 8638,
        ERR_BadNullableTypeof = 8639,
        ERR_ExpressionTreeCantContainRefStruct = 8640,
        ERR_ElseCannotStartStatement = 8641,
        ERR_ExpressionTreeCantContainNullCoalescingAssignment = 8642,
        WRN_NullabilityMismatchInExplicitlyImplementedInterface = 8643,
        WRN_NullabilityMismatchInInterfaceImplementedByBase = 8644,
        WRN_DuplicateInterfaceWithNullabilityMismatchInBaseList = 8645,
        ERR_DuplicateExplicitImpl = 8646,
        ERR_UsingVarInSwitchCase = 8647,
        ERR_GoToForwardJumpOverUsingVar = 8648,
        ERR_GoToBackwardJumpOverUsingVar = 8649,
        ERR_IsNullableType = 8650,
        ERR_AsNullableType = 8651,
        ERR_FeatureInPreview = 8652,
        //WRN_DefaultExpressionMayIntroduceNullT = 8653,
        //WRN_NullLiteralMayIntroduceNullT = 8654,
        WRN_SwitchExpressionNotExhaustiveForNull = 8655,

        WRN_ImplicitCopyInReadOnlyMember = 8656,
        ERR_StaticMemberCantBeReadOnly = 8657,
        ERR_AutoSetterCantBeReadOnly = 8658,
        ERR_AutoPropertyWithSetterCantBeReadOnly = 8659,
        ERR_InvalidPropertyReadOnlyMods = 8660,
        ERR_DuplicatePropertyReadOnlyMods = 8661,
        ERR_FieldLikeEventCantBeReadOnly = 8662,
        ERR_PartialMemberReadOnlyDifference = 8663,
        ERR_ReadOnlyModMissingAccessor = 8664,
        ERR_OverrideRefConstraintNotSatisfied = 8665,
        ERR_OverrideValConstraintNotSatisfied = 8666,

        WRN_NullabilityMismatchInConstraintsOnPartialImplementation = 8667,
        ERR_NullableDirectiveTargetExpected = 8668,
        WRN_MissingNonNullTypesContextForAnnotationInGeneratedCode = 8669,
        WRN_NullReferenceInitializer = 8670,

        ERR_MultipleAnalyzerConfigsInSameDir = 8700,

        ERR_RuntimeDoesNotSupportDefaultInterfaceImplementation = 8701,
        ERR_RuntimeDoesNotSupportDefaultInterfaceImplementationForMember = 8702,
        ERR_InvalidModifierForLanguageVersion = 8703,
        ERR_ImplicitImplementationOfNonPublicInterfaceMember = 8704,
        ERR_MostSpecificImplementationIsNotFound = 8705,
        ERR_LanguageVersionDoesNotSupportInterfaceImplementationForMember = 8706,

        ERR_RuntimeDoesNotSupportProtectedAccessForInterfaceMember = 8707,
        //ERR_NotBaseOrImplementedInterface = 8708,
        //ERR_NotImplementedInBase = 8709,
        //ERR_NotDeclaredInBase = 8710,

        ERR_DefaultInterfaceImplementationInNoPIAType = 8711,
        ERR_AbstractEventHasAccessors = 8712,
        //ERR_NotNullConstraintMustBeFirst = 8713,
        WRN_NullabilityMismatchInTypeParameterNotNullConstraint = 8714,

        ERR_DuplicateNullSuppression = 8715,
        ERR_DefaultLiteralNoTargetType = 8716,

        ERR_ReAbstractionInNoPIAType = 8750,

        #endregion diagnostics introduced for C# 8.0

        #region diagnostics introduced in C# 9.0

        ERR_InternalError = 8751,

        ERR_ImplicitObjectCreationIllegalTargetType = 8752,
        ERR_ImplicitObjectCreationNotValid = 8753,
        ERR_ImplicitObjectCreationNoTargetType = 8754,

        ERR_BadFuncPointerParamModifier = 8755,
        ERR_BadFuncPointerArgCount = 8756,
        ERR_MethFuncPtrMismatch = 8757,
        ERR_FuncPtrRefMismatch = 8758,
        ERR_FuncPtrMethMustBeStatic = 8759,

        ERR_ExternEventInitializer = 8760,
        ERR_AmbigBinaryOpsOnUnconstrainedDefault = 8761,
        WRN_ParameterConditionallyDisallowsNull = 8762,
        WRN_ShouldNotReturn = 8763,

        WRN_TopLevelNullabilityMismatchInReturnTypeOnOverride = 8764,
        WRN_TopLevelNullabilityMismatchInParameterTypeOnOverride = 8765,

        WRN_TopLevelNullabilityMismatchInReturnTypeOnImplicitImplementation = 8766,
        WRN_TopLevelNullabilityMismatchInParameterTypeOnImplicitImplementation = 8767,
        WRN_TopLevelNullabilityMismatchInReturnTypeOnExplicitImplementation = 8768,
        WRN_TopLevelNullabilityMismatchInParameterTypeOnExplicitImplementation = 8769,

        WRN_DoesNotReturnMismatch = 8770,
        ERR_NoOutputDirectory = 8771,
        ERR_StdInOptionProvidedButConsoleInputIsNotRedirected = 8772,

        ERR_FeatureNotAvailableInVersion9 = 8773,

        WRN_MemberNotNull = 8774,
        WRN_MemberNotNullWhen = 8775,
        WRN_MemberNotNullBadMember = 8776,
        WRN_ParameterDisallowsNull = 8777,
        WRN_ConstOutOfRangeChecked = 8778,

        ERR_DuplicateInterfaceWithDifferencesInBaseList = 8779,
        ERR_DesignatorBeneathPatternCombinator = 8780,
        ERR_UnsupportedTypeForRelationalPattern = 8781,
        ERR_RelationalPatternWithNaN = 8782,

        ERR_ConditionalOnLocalFunction = 8783,

        WRN_GeneratorFailedDuringInitialization = 8784,
        WRN_GeneratorFailedDuringGeneration = 8785,

        ERR_WrongFuncPtrCallingConvention = 8786,
        ERR_MissingAddressOf = 8787,
        ERR_CannotUseReducedExtensionMethodInAddressOf = 8788,
        ERR_CannotUseFunctionPointerAsFixedLocal = 8789,

        ERR_ExpressionTreeContainsPatternImplicitIndexer = 8790,
        ERR_ExpressionTreeContainsFromEndIndexExpression = 8791,
        ERR_ExpressionTreeContainsRangeExpression = 8792,
        WRN_GivenExpressionAlwaysMatchesPattern = 8793,
        WRN_IsPatternAlways = 8794,

        ERR_PartialMethodWithAccessibilityModsMustHaveImplementation = 8795,
        ERR_PartialMethodWithNonVoidReturnMustHaveAccessMods = 8796,
        ERR_PartialMethodWithOutParamMustHaveAccessMods = 8797,
        ERR_PartialMethodWithExtendedModMustHaveAccessMods = 8798,
        ERR_PartialMemberAccessibilityDifference = 8799,
        ERR_PartialMemberExtendedModDifference = 8800,

        ERR_SimpleProgramLocalIsReferencedOutsideOfTopLevelStatement = 8801,
        ERR_SimpleProgramMultipleUnitsWithTopLevelStatements = 8802,
        ERR_TopLevelStatementAfterNamespaceOrType = 8803,
        // ERR_SimpleProgramDisallowsMainType = 8804,
        ERR_SimpleProgramNotAnExecutable = 8805,

        ERR_UnsupportedCallingConvention = 8806,
        ERR_InvalidFunctionPointerCallingConvention = 8807,
        ERR_InvalidFuncPointerReturnTypeModifier = 8808,
        ERR_DupReturnTypeMod = 8809,
        ERR_AddressOfMethodGroupInExpressionTree = 8810,
        ERR_CannotConvertAddressOfToDelegate = 8811,
        ERR_AddressOfToNonFunctionPointer = 8812,

        ERR_ModuleInitializerMethodMustBeOrdinary = 8813,
        ERR_ModuleInitializerMethodMustBeAccessibleOutsideTopLevelType = 8814,
        ERR_ModuleInitializerMethodMustBeStaticParameterlessVoid = 8815,
        ERR_ModuleInitializerMethodAndContainingTypesMustNotBeGeneric = 8816,

        ERR_PartialMethodReturnTypeDifference = 8817,
        ERR_PartialMemberRefReturnDifference = 8818,
        WRN_NullabilityMismatchInReturnTypeOnPartial = 8819,

        ERR_StaticAnonymousFunctionCannotCaptureVariable = 8820,
        ERR_StaticAnonymousFunctionCannotCaptureThis = 8821,
        ERR_OverrideDefaultConstraintNotSatisfied = 8822,
        ERR_DefaultConstraintOverrideOnly = 8823,
        WRN_ParameterNotNullIfNotNull = 8824,
        WRN_ReturnNotNullIfNotNull = 8825,
        WRN_PartialMethodTypeDifference = 8826,

        ERR_RuntimeDoesNotSupportCovariantReturnsOfClasses = 8830,
        ERR_RuntimeDoesNotSupportCovariantPropertiesOfClasses = 8831,

        WRN_SwitchExpressionNotExhaustiveWithWhen = 8846,
        WRN_SwitchExpressionNotExhaustiveForNullWithWhen = 8847,
        WRN_PrecedenceInversion = 8848,
        ERR_ExpressionTreeContainsWithExpression = 8849,

        WRN_AnalyzerReferencesFramework = 8850,

        // WRN_EqualsWithoutGetHashCode is for object.Equals and works for classes.
        // WRN_RecordEqualsWithoutGetHashCode is for IEquatable<T>.Equals and works for records.
        WRN_RecordEqualsWithoutGetHashCode = 8851,

        ERR_AssignmentInitOnly = 8852,
        ERR_CantChangeInitOnlyOnOverride = 8853,
        ERR_CloseUnimplementedInterfaceMemberWrongInitOnly = 8854,
        ERR_ExplicitPropertyMismatchInitOnly = 8855,
        ERR_BadInitAccessor = 8856,
        ERR_InvalidWithReceiverType = 8857,
        ERR_CannotClone = 8858,
        ERR_CloneDisallowedInRecord = 8859,
        WRN_RecordNamedDisallowed = 8860,
        ERR_UnexpectedArgumentList = 8861,
        ERR_UnexpectedOrMissingConstructorInitializerInRecord = 8862,
        ERR_MultipleRecordParameterLists = 8863,
        ERR_BadRecordBase = 8864,
        ERR_BadInheritanceFromRecord = 8865,
        ERR_BadRecordMemberForPositionalParameter = 8866,
        ERR_NoCopyConstructorInBaseType = 8867,
        ERR_CopyConstructorMustInvokeBaseCopyConstructor = 8868,
        ERR_DoesNotOverrideMethodFromObject = 8869,
        ERR_SealedAPIInRecord = 8870,
        ERR_DoesNotOverrideBaseMethod = 8871,
        ERR_NotOverridableAPIInRecord = 8872,
        ERR_NonPublicAPIInRecord = 8873,
        ERR_SignatureMismatchInRecord = 8874,
        ERR_NonProtectedAPIInRecord = 8875,
        ERR_DoesNotOverrideBaseEqualityContract = 8876,
        ERR_StaticAPIInRecord = 8877,
        ERR_CopyConstructorWrongAccessibility = 8878,
        ERR_NonPrivateAPIInRecord = 8879,

        // The following warnings correspond to errors of the same name, but are reported
        // when a definite assignment issue is reported due to private fields imported from metadata.
        WRN_UnassignedThisAutoPropertyUnsupportedVersion = 8880,
        WRN_UnassignedThisUnsupportedVersion = 8881,
        WRN_ParamUnassigned = 8882,
        WRN_UseDefViolationProperty = 8883,
        WRN_UseDefViolationField = 8884,
        WRN_UseDefViolationThisUnsupportedVersion = 8885,
        WRN_UseDefViolationOut = 8886,
        WRN_UseDefViolation = 8887,

        ERR_CannotSpecifyManagedWithUnmanagedSpecifiers = 8888,
        ERR_RuntimeDoesNotSupportUnmanagedDefaultCallConv = 8889,
        ERR_TypeNotFound = 8890,
        ERR_TypeMustBePublic = 8891,

        WRN_SyncAndAsyncEntryPoints = 8892,

        ERR_InvalidUnmanagedCallersOnlyCallConv = 8893,
        ERR_CannotUseManagedTypeInUnmanagedCallersOnly = 8894,
        ERR_UnmanagedCallersOnlyMethodOrTypeCannotBeGeneric = 8895,
        ERR_UnmanagedCallersOnlyRequiresStatic = 8896,

        // The following warnings correspond to errors of the same name, but are reported
        // as warnings on interface methods and properties due in warning level 5. They
        // were not reported at all prior to level 5.
        WRN_ParameterIsStaticClass = 8897,
        WRN_ReturnTypeIsStaticClass = 8898,

        ERR_EntryPointCannotBeUnmanagedCallersOnly = 8899,
        ERR_ModuleInitializerCannotBeUnmanagedCallersOnly = 8900,
        ERR_UnmanagedCallersOnlyMethodsCannotBeCalledDirectly = 8901,
        ERR_UnmanagedCallersOnlyMethodsCannotBeConvertedToDelegate = 8902,

        ERR_InitCannotBeReadonly = 8903,

        ERR_UnexpectedVarianceStaticMember = 8904,
        ERR_FunctionPointersCannotBeCalledWithNamedArguments = 8905,

        ERR_EqualityContractRequiresGetter = 8906,
        WRN_UnreadRecordParameter = 8907,
        ERR_BadFieldTypeInRecord = 8908,

        WRN_DoNotCompareFunctionPointers = 8909,
        ERR_RecordAmbigCtor = 8910,
        ERR_FunctionPointerTypesInAttributeNotSupported = 8911,

        #endregion diagnostics introduced for C# 9.0

        #region diagnostics introduced for C# 10.0

        ERR_InheritingFromRecordWithSealedToString = 8912,
        ERR_HiddenPositionalMember = 8913,
        ERR_GlobalUsingInNamespace = 8914,
        ERR_GlobalUsingOutOfOrder = 8915,
        ERR_AttributesRequireParenthesizedLambdaExpression = 8916,
        ERR_CannotInferDelegateType = 8917,
        ERR_InvalidNameInSubpattern = 8918,

        ERR_RuntimeDoesNotSupportStaticAbstractMembersInInterfaces = 8919,
        ERR_GenericConstraintNotSatisfiedInterfaceWithStaticAbstractMembers = 8920,
        ERR_BadAbstractUnaryOperatorSignature = 8921,
        ERR_BadAbstractIncDecSignature = 8922,
        ERR_BadAbstractIncDecRetType = 8923,
        ERR_BadAbstractBinaryOperatorSignature = 8924,
        ERR_BadAbstractShiftOperatorSignature = 8925,
        ERR_BadAbstractStaticMemberAccess = 8926,
        ERR_ExpressionTreeContainsAbstractStaticMemberAccess = 8927,
        ERR_CloseUnimplementedInterfaceMemberNotStatic = 8928,
        ERR_RuntimeDoesNotSupportStaticAbstractMembersInInterfacesForMember = 8929,
        ERR_ExplicitImplementationOfOperatorsMustBeStatic = 8930,
        ERR_AbstractConversionNotInvolvingContainedType = 8931,
        ERR_InterfaceImplementedByUnmanagedCallersOnlyMethod = 8932,
        HDN_DuplicateWithGlobalUsing = 8933,
        ERR_CantConvAnonMethReturnType = 8934,
        ERR_BuilderAttributeDisallowed = 8935,
        ERR_FeatureNotAvailableInVersion10 = 8936,
        ERR_SimpleProgramIsEmpty = 8937,
        ERR_LineSpanDirectiveInvalidValue = 8938,
        ERR_LineSpanDirectiveEndLessThanStart = 8939,
        ERR_WrongArityAsyncReturn = 8940,

        ERR_InterpolatedStringHandlerMethodReturnMalformed = 8941,
        ERR_InterpolatedStringHandlerMethodReturnInconsistent = 8942,
        ERR_NullInvalidInterpolatedStringHandlerArgumentName = 8943,
        ERR_NotInstanceInvalidInterpolatedStringHandlerArgumentName = 8944,
        ERR_InvalidInterpolatedStringHandlerArgumentName = 8945,
        ERR_TypeIsNotAnInterpolatedStringHandlerType = 8946,
        WRN_ParameterOccursAfterInterpolatedStringHandlerParameter = 8947,
        ERR_CannotUseSelfAsInterpolatedStringHandlerArgument = 8948,
        ERR_InterpolatedStringHandlerArgumentAttributeMalformed = 8949,
        ERR_InterpolatedStringHandlerArgumentLocatedAfterInterpolatedString = 8950,
        ERR_InterpolatedStringHandlerArgumentOptionalNotSpecified = 8951,
        ERR_ExpressionTreeContainsInterpolatedStringHandlerConversion = 8952,
        ERR_InterpolatedStringHandlerCreationCannotUseDynamic = 8953,
        ERR_MultipleFileScopedNamespace = 8954,
        ERR_FileScopedAndNormalNamespace = 8955,
        ERR_FileScopedNamespaceNotBeforeAllMembers = 8956,
        ERR_NoImplicitConvTargetTypedConditional = 8957,
        ERR_NonPublicParameterlessStructConstructor = 8958,
        ERR_NoConversionForCallerArgumentExpressionParam = 8959,
        WRN_CallerLineNumberPreferredOverCallerArgumentExpression = 8960,
        WRN_CallerFilePathPreferredOverCallerArgumentExpression = 8961,
        WRN_CallerMemberNamePreferredOverCallerArgumentExpression = 8962,
        WRN_CallerArgumentExpressionAttributeHasInvalidParameterName = 8963,
        ERR_BadCallerArgumentExpressionParamWithoutDefaultValue = 8964,
        WRN_CallerArgumentExpressionAttributeSelfReferential = 8965,
        WRN_CallerArgumentExpressionParamForUnconsumedLocation = 8966,
        ERR_NewlinesAreNotAllowedInsideANonVerbatimInterpolatedString = 8967,
        ERR_AttrTypeArgCannotBeTypeVar = 8968,
        // WRN_AttrDependentTypeNotAllowed = 8969, // Backed out of of warning wave 6, may be reintroduced later
        ERR_AttrDependentTypeNotAllowed = 8970,
        WRN_InterpolatedStringHandlerArgumentAttributeIgnoredOnLambdaParameters = 8971,
        ERR_LambdaWithAttributesToExpressionTree = 8972,

        WRN_CompileTimeCheckedOverflow = 8973,
        WRN_MethGrpToNonDel = 8974,
        ERR_LambdaExplicitReturnTypeVar = 8975,
        ERR_InterpolatedStringsReferencingInstanceCannotBeInObjectInitializers = 8976,

        // Added in VS 17.1. Technically a breaking change, but the code it breaks was already guaranteed to throw
        // at runtime.
        ERR_CannotUseRefInUnmanagedCallersOnly = 8977,

        #endregion

        #region diagnostics introduced for C# 11.0

        ERR_CannotBeMadeNullable = 8978,
        ERR_UnsupportedTypeForListPattern = 8979,
        ERR_MisplacedSlicePattern = 8980,

        WRN_LowerCaseTypeName = 8981,
        ERR_RecordStructConstructorCallsDefaultConstructor = 8982,
        ERR_StructHasInitializersAndNoDeclaredConstructor = 8983,
        // ERR_EncUpdateFailedDelegateTypeChanged = 8984,

        ERR_ListPatternRequiresLength = 8985,
        ERR_ScopedMismatchInParameterOfTarget = 8986,
        ERR_ScopedMismatchInParameterOfOverrideOrImplementation = 8987,
        ERR_ScopedMismatchInParameterOfPartial = 8988,

        // param-nullchecking feature removed from C# 11
        // ERR_ParameterNullCheckingNotSupported = 8989,
        // ERR_DiscardCannotBeNullChecked = 8990,
        // ERR_MustNullCheckInImplementation = 8991,
        // ERR_NonNullableValueTypeIsNullChecked = 8992,
        // WRN_NullCheckedHasDefaultNull = 8993,
        // ERR_NullCheckingOnOutParameter = 8994,
        // WRN_NullCheckingOnNullableType = 8995,

        ERR_RawStringNotInDirectives = 8996,
        ERR_UnterminatedRawString = 8997,
        ERR_TooManyQuotesForRawString = 8998,
        ERR_LineDoesNotStartWithSameWhitespace = 8999,
        ERR_RawStringDelimiterOnOwnLine = 9000,
        ERR_RawStringInVerbatimInterpolatedStrings = 9001,
        ERR_RawStringMustContainContent = 9002,
        ERR_LineContainsDifferentWhitespace = 9003,

        // raw interpolated string literals
        ERR_NotEnoughQuotesForRawString = 9004,
        ERR_NotEnoughCloseBracesForRawString = 9005,
        ERR_TooManyOpenBracesForRawString = 9006,
        ERR_TooManyCloseBracesForRawString = 9007,

        ERR_IllegalAtSequence = 9008,
        ERR_StringMustStartWithQuoteCharacter = 9009,

        ERR_NoEnumConstraint = 9010,
        ERR_NoDelegateConstraint = 9011,
        ERR_MisplacedRecord = 9012,
        ERR_PatternSpanCharCannotBeStringNull = 9013,

        ERR_UseDefViolationPropertyUnsupportedVersion = 9014,
        ERR_UseDefViolationFieldUnsupportedVersion = 9015,
        WRN_UseDefViolationPropertyUnsupportedVersion = 9016,
        WRN_UseDefViolationFieldUnsupportedVersion = 9017,

        WRN_UseDefViolationPropertySupportedVersion = 9018,
        WRN_UseDefViolationFieldSupportedVersion = 9019,
        WRN_UseDefViolationThisSupportedVersion = 9020,
        WRN_UnassignedThisAutoPropertySupportedVersion = 9021,
        WRN_UnassignedThisSupportedVersion = 9022,

        ERR_OperatorCantBeChecked = 9023,
        ERR_ImplicitConversionOperatorCantBeChecked = 9024,
        ERR_CheckedOperatorNeedsMatch = 9025,

        ERR_CannotBeConvertedToUtf8 = 9026,
        ERR_MisplacedUnchecked = 9027,
        ERR_LineSpanDirectiveRequiresSpace = 9028,

        ERR_RequiredNameDisallowed = 9029,
        ERR_OverrideMustHaveRequired = 9030,
        ERR_RequiredMemberCannotBeHidden = 9031,
        ERR_RequiredMemberCannotBeLessVisibleThanContainingType = 9032,
        ERR_ExplicitRequiredMember = 9033,
        ERR_RequiredMemberMustBeSettable = 9034,
        ERR_RequiredMemberMustBeSet = 9035,
        ERR_RequiredMembersMustBeAssignedValue = 9036,
        ERR_RequiredMembersInvalid = 9037,
        ERR_RequiredMembersBaseTypeInvalid = 9038,
        ERR_ChainingToSetsRequiredMembersRequiresSetsRequiredMembers = 9039,
        ERR_NewConstraintCannotHaveRequiredMembers = 9040,
        ERR_UnsupportedCompilerFeature = 9041,
        WRN_ObsoleteMembersShouldNotBeRequired = 9042,
        ERR_RefReturningPropertiesCannotBeRequired = 9043,
        ERR_ImplicitImplementationOfInaccessibleInterfaceMember = 9044,
        ERR_ScriptsAndSubmissionsCannotHaveRequiredMembers = 9045,
        ERR_BadAbstractEqualityOperatorSignature = 9046,
        ERR_BadBinaryReadOnlySpanConcatenation = 9047,
        ERR_ScopedRefAndRefStructOnly = 9048,
        ERR_FixedFieldMustNotBeRef = 9049,
        ERR_RefFieldCannotReferToRefStruct = 9050,

        ERR_FileTypeDisallowedInSignature = 9051,
        ERR_FileTypeNoExplicitAccessibility = 9052,
        ERR_FileTypeBase = 9053,
        ERR_FileTypeNested = 9054,
        ERR_GlobalUsingStaticFileType = 9055,
        ERR_FileTypeNameDisallowed = 9056,
        WRN_AnalyzerReferencesNewerCompiler = 9057,
        ERR_FeatureNotAvailableInVersion11 = 9058,
        ERR_RefFieldInNonRefStruct = 9059,
        ERR_CannotMatchOnINumberBase = 9060,
        ERR_ScopedDiscard = 9061,
        ERR_ScopedTypeNameDisallowed = 9062,
        ERR_UnscopedRefAttributeUnsupportedTarget = 9063,
        ERR_RuntimeDoesNotSupportRefFields = 9064,
        ERR_ExplicitScopedRef = 9065,
        ERR_UnscopedScoped = 9066,
        WRN_DuplicateAnalyzerReference = 9067,
        ERR_FileTypeNonUniquePath = 9068,
        ERR_FilePathCannotBeConvertedToUtf8 = 9069,
        //ERR_ReadOnlyNotSuppAsParamModDidYouMeanIn = 9070,
        ERR_FileLocalDuplicateNameInNS = 9071,
        ERR_DeconstructVariableCannotBeByRef = 9072,
        WRN_ScopedMismatchInParameterOfTarget = 9073,
        WRN_ScopedMismatchInParameterOfOverrideOrImplementation = 9074,
        ERR_RefReturnScopedParameter = 9075,
        ERR_RefReturnScopedParameter2 = 9076,
        ERR_RefReturnOnlyParameter = 9077,
        ERR_RefReturnOnlyParameter2 = 9078,
        ERR_RefAssignReturnOnly = 9079,

        WRN_EscapeVariable = 9080,
        WRN_EscapeStackAlloc = 9081,
        WRN_RefReturnNonreturnableLocal = 9082,
        WRN_RefReturnNonreturnableLocal2 = 9083,
        WRN_RefReturnStructThis = 9084,
        WRN_RefAssignNarrower = 9085,
        WRN_MismatchedRefEscapeInTernary = 9086,
        WRN_RefReturnParameter = 9087,
        WRN_RefReturnScopedParameter = 9088,
        WRN_RefReturnParameter2 = 9089,
        WRN_RefReturnScopedParameter2 = 9090,
        WRN_RefReturnLocal = 9091,
        WRN_RefReturnLocal2 = 9092,
        WRN_RefAssignReturnOnly = 9093,
        WRN_RefReturnOnlyParameter = 9094,
        WRN_RefReturnOnlyParameter2 = 9095,
        ERR_RefAssignValEscapeWider = 9096,
        WRN_RefAssignValEscapeWider = 9097,

        #endregion

        #region diagnostics introduced for C# 12.0

        ERR_ImplicitlyTypedDefaultParameter = 9098,
        WRN_OptionalParamValueMismatch = 9099,
        WRN_ParamsArrayInLambdaOnly = 9100,
        ERR_UnscopedRefAttributeUnsupportedMemberTarget = 9101,
        ERR_UnscopedRefAttributeInterfaceImplementation = 9102,
        ERR_UnrecognizedAttributeVersion = 9103,
        // ERR_BadSpecialByRefUsing = 9104,

        ERR_InvalidPrimaryConstructorParameterReference = 9105,
        ERR_AmbiguousPrimaryConstructorParameterAsColorColorReceiver = 9106,
        WRN_CapturedPrimaryConstructorParameterPassedToBase = 9107,
        ERR_AnonDelegateCantUseRefLike = 9108,
        ERR_UnsupportedPrimaryConstructorParameterCapturingRef = 9109,
        ERR_UnsupportedPrimaryConstructorParameterCapturingRefLike = 9110,
        ERR_AnonDelegateCantUseStructPrimaryConstructorParameterInMember = 9111,
        ERR_AnonDelegateCantUseStructPrimaryConstructorParameterCaptured = 9112,
        WRN_UnreadPrimaryConstructorParameter = 9113,
        ERR_AssgReadonlyPrimaryConstructorParameter = 9114,
        ERR_RefReturnReadonlyPrimaryConstructorParameter = 9115,
        ERR_RefReadonlyPrimaryConstructorParameter = 9116,
        ERR_AssgReadonlyPrimaryConstructorParameter2 = 9117,
        ERR_RefReturnReadonlyPrimaryConstructorParameter2 = 9118,
        ERR_RefReadonlyPrimaryConstructorParameter2 = 9119,
        ERR_RefReturnPrimaryConstructorParameter = 9120,
        ERR_StructLayoutCyclePrimaryConstructorParameter = 9121,
        ERR_UnexpectedParameterList = 9122,
        WRN_AddressOfInAsync = 9123,
        WRN_CapturedPrimaryConstructorParameterInFieldInitializer = 9124,
        WRN_ByValArraySizeConstRequired = 9125,

        ERR_BadRefInUsingAlias = 9130,
        ERR_BadUnsafeInUsingDirective = 9131,
        ERR_BadNullableReferenceTypeInUsingAlias = 9132,
        ERR_BadStaticAfterUnsafe = 9133,

        ERR_BadCaseInSwitchArm = 9134,
        ERR_ConstantValueOfTypeExpected = 9135,
        ERR_UnsupportedPrimaryConstructorParameterCapturingRefAny = 9136,

        ERR_InterceptorsFeatureNotEnabled = 9137,
        ERR_InterceptorContainingTypeCannotBeGeneric = 9138,
        ERR_InterceptorPathNotInCompilation = 9139,
        ERR_InterceptorPathNotInCompilationWithCandidate = 9140,
        ERR_InterceptorPositionBadToken = 9141,
        ERR_InterceptorLineOutOfRange = 9142,
        ERR_InterceptorCharacterOutOfRange = 9143,
        ERR_InterceptorSignatureMismatch = 9144,
        // ERR_InterceptorPathNotInCompilationWithUnmappedCandidate = 9145,
        ERR_InterceptorMethodMustBeOrdinary = 9146,
        ERR_InterceptorMustReferToStartOfTokenPosition = 9147,
        ERR_InterceptorMustHaveMatchingThisParameter = 9148,
        ERR_InterceptorMustNotHaveThisParameter = 9149,
        ERR_InterceptorFilePathCannotBeNull = 9150,
        ERR_InterceptorNameNotInvoked = 9151,
        ERR_InterceptorNonUniquePath = 9152,
        ERR_DuplicateInterceptor = 9153,
        WRN_InterceptorSignatureMismatch = 9154,
        ERR_InterceptorNotAccessible = 9155,
        ERR_InterceptorScopedMismatch = 9156,
        ERR_InterceptorLineCharacterMustBePositive = 9157,
        WRN_NullabilityMismatchInReturnTypeOnInterceptor = 9158,
        WRN_NullabilityMismatchInParameterTypeOnInterceptor = 9159,
        ERR_InterceptorCannotInterceptNameof = 9160,
        ERR_InterceptorCannotUseUnmanagedCallersOnly = 9161,

        ERR_BadUsingStaticType = 9162,
        ERR_SymbolDefinedInAssembly = 9163,

        ERR_InlineArrayConversionToSpanNotSupported = 9164,
        ERR_InlineArrayConversionToReadOnlySpanNotSupported = 9165,
        ERR_InlineArrayIndexOutOfRange = 9166,
        ERR_InvalidInlineArrayLength = 9167,
        ERR_InvalidInlineArrayLayout = 9168,
        ERR_InvalidInlineArrayFields = 9169,
        ERR_ExpressionTreeContainsInlineArrayOperation = 9170,
        ERR_RuntimeDoesNotSupportInlineArrayTypes = 9171,
        ERR_InlineArrayBadIndex = 9172,
        ERR_NamedArgumentForInlineArray = 9173,

        ERR_CollectionExpressionTargetTypeNotConstructible = 9174,
        ERR_ExpressionTreeContainsCollectionExpression = 9175,
        ERR_CollectionExpressionNoTargetType = 9176,

        ERR_InterceptorArityNotCompatible = 9177,
        ERR_InterceptorCannotBeGeneric = 9178,

        WRN_PrimaryConstructorParameterIsShadowedAndNotPassedToBase = 9179,

        ERR_InlineArrayUnsupportedElementFieldModifier = 9180,
        WRN_InlineArrayIndexerNotUsed = 9181,
        WRN_InlineArraySliceNotUsed = 9182,
        WRN_InlineArrayConversionOperatorNotUsed = 9183,
        WRN_InlineArrayNotSupportedByLanguage = 9184,
        ERR_CollectionBuilderAttributeInvalidType = 9185,
        ERR_CollectionBuilderAttributeInvalidMethodName = 9186,
        ERR_CollectionBuilderAttributeMethodNotFound = 9187,
        ERR_CollectionBuilderNoElementType = 9188,
        ERR_InlineArrayForEachNotSupported = 9189,

        ERR_RefReadOnlyWrongOrdering = 9190,
        WRN_BadArgRef = 9191,
        WRN_ArgExpectedRefOrIn = 9192,
        WRN_RefReadonlyNotVariable = 9193,
        ERR_BadArgExtraRefLangVersion = 9194,
        WRN_ArgExpectedIn = 9195,
        WRN_OverridingDifferentRefness = 9196,
        WRN_HidingDifferentRefness = 9197,
        WRN_TargetDifferentRefness = 9198,
        ERR_OutAttrOnRefReadonlyParam = 9199,
        WRN_RefReadonlyParameterDefaultValue = 9200,
        WRN_UseDefViolationRefField = 9201,

        ERR_FeatureNotAvailableInVersion12 = 9202,
        ERR_CollectionExpressionEscape = 9203,
        WRN_Experimental = 9204,
        ERR_ExpectedInterpolatedString = 9205,

        ERR_InterceptorGlobalNamespace = 9206,
        ERR_InterceptableMethodMustBeOrdinary = 9207,

        WRN_CollectionExpressionRefStructMayAllocate = 9208,
        WRN_CollectionExpressionRefStructSpreadMayAllocate = 9209,
        ERR_CollectionExpressionImmutableArray = 9210,

        ERR_InvalidExperimentalDiagID = 9211,
        ERR_SpreadMissingMember = 9212,
        ERR_CollectionExpressionTargetNoElementType = 9213,
        ERR_CollectionExpressionMissingConstructor = 9214,
        ERR_CollectionExpressionMissingAdd = 9215,

        WRN_ConvertingLock = 9216,
        ERR_RefLocalAcrossAwait = 9217,

        ERR_DynamicDispatchToParamsCollection = 9218,
        // available 9219,
        // available 9220,
        // available 9221,
        ERR_CollectionInitializerInfiniteChainOfAddCalls = 9222,
        ERR_ParamsCollectionInfiniteChainOfConstructorCalls = 9223,
        ERR_ParamsMemberCannotBeLessVisibleThanDeclaringMember = 9224,
        ERR_ParamsCollectionConstructorDoesntInitializeRequiredMember = 9225,
        ERR_ParamsCollectionExpressionTree = 9226,
        ERR_ParamsCollectionExtensionAddMethod = 9227,
        ERR_ParamsCollectionMissingConstructor = 9228,

        ERR_NoModifiersOnUsing = 9229,
        ERR_CannotDynamicInvokeOnExpression = 9230,

        ERR_InterceptsLocationDataInvalidFormat = 9231,
        ERR_InterceptsLocationUnsupportedVersion = 9232,
        ERR_InterceptsLocationDuplicateFile = 9233,
        ERR_InterceptsLocationFileNotFound = 9234,
        ERR_InterceptsLocationDataInvalidPosition = 9235,
        INF_TooManyBoundLambdas = 9236,

        #endregion

        // available 9237
        ERR_BadYieldInUnsafe = 9238,
        ERR_AddressOfInIterator = 9239,

        ERR_RuntimeDoesNotSupportByRefLikeGenerics = 9240,
        ERR_RefStructConstraintAlreadySpecified = 9241,
        ERR_AllowsClauseMustBeLast = 9242,
        ERR_ClassIsCombinedWithRefStruct = 9243,
        ERR_NotRefStructConstraintNotSatisfied = 9244,
        ERR_RefStructDoesNotSupportDefaultInterfaceImplementationForMember = 9245,
        ERR_BadNonVirtualInterfaceMemberAccessOnAllowsRefLike = 9246,
        ERR_BadAllowByRefLikeEnumerator = 9247,

        ERR_PartialPropertyMissingImplementation = 9248,
        ERR_PartialPropertyMissingDefinition = 9249,
        ERR_PartialPropertyDuplicateDefinition = 9250,
        ERR_PartialPropertyDuplicateImplementation = 9251,
        ERR_PartialPropertyMissingAccessor = 9252,
        ERR_PartialPropertyUnexpectedAccessor = 9253,
        ERR_PartialPropertyInitMismatch = 9254,
        ERR_PartialMemberTypeDifference = 9255,
        WRN_PartialMemberSignatureDifference = 9256,
        ERR_PartialPropertyRequiredDifference = 9257,

        WRN_FieldIsAmbiguous = 9258,

        ERR_InlineArrayAttributeOnRecord = 9259,
        ERR_FeatureNotAvailableInVersion13 = 9260,

        ERR_CannotApplyOverloadResolutionPriorityToOverride = 9261,
        ERR_CannotApplyOverloadResolutionPriorityToMember = 9262,
        ERR_PartialPropertyDuplicateInitializer = 9263,

        WRN_UninitializedNonNullableBackingField = 9264,
        WRN_UnassignedInternalRefField = 9265,
        WRN_AccessorDoesNotUseBackingField = 9266,

        ERR_IteratorRefLikeElementType = 9267,

        WRN_ExperimentalWithMessage = 9268,

        WRN_UnscopedRefAttributeOldRules = 9269,
        WRN_InterceptsLocationAttributeUnsupportedSignature = 9270,

        ERR_EmbeddedAttributeMustFollowPattern = 9271,
        ERR_ImplicitlyTypedParamsParameter = 9272,
        ERR_VariableDeclarationNamedField = 9273,

        ERR_DataSectionStringLiteralHashCollision = 9274,

        ERR_PartialMemberMissingImplementation = 9275,
        ERR_PartialMemberMissingDefinition = 9276,
        ERR_PartialMemberDuplicateDefinition = 9277,
        ERR_PartialMemberDuplicateImplementation = 9278,
        ERR_PartialEventInitializer = 9279,
        ERR_PartialConstructorInitializer = 9280,

        ERR_ExtensionDisallowsName = 9281,
        ERR_ExtensionDisallowsMember = 9282,
        ERR_BadExtensionContainingType = 9283,
        ERR_ExtensionParameterDisallowsDefaultValue = 9284,
        ERR_ReceiverParameterOnlyOne = 9285,
        ERR_ExtensionResolutionFailed = 9286,
        ERR_ReceiverParameterSameNameAsTypeParameter = 9287,
        ERR_LocalSameNameAsExtensionTypeParameter = 9288,
        ERR_TypeParameterSameNameAsExtensionTypeParameter = 9289,
        ERR_LocalSameNameAsExtensionParameter = 9290,
        ERR_ValueParameterSameNameAsExtensionParameter = 9291,
        ERR_TypeParameterSameNameAsExtensionParameter = 9292,
        ERR_InvalidExtensionParameterReference = 9293,
        ERR_ValueParameterSameNameAsExtensionTypeParameter = 9294,
        ERR_UnderspecifiedExtension = 9295,
        ERR_ExpressionTreeContainsExtensionPropertyAccess = 9296,

        ERR_PPIgnoredFollowsToken = 9297,
        ERR_PPIgnoredNeedsFileBasedProgram = 9298,
        ERR_PPIgnoredFollowsIf = 9299,

        ERR_RefExtensionParameterMustBeValueTypeOrConstrainedToOne = 9300,
        ERR_InExtensionParameterMustBeValueType = 9301,
        ERR_ProtectedInExtension = 9302,
        ERR_InstanceMemberWithUnnamedExtensionsParameter = 9303,
        ERR_InitInExtension = 9304,
        ERR_ModifierOnUnnamedReceiverParameter = 9305,
        ERR_ExtensionTypeNameDisallowed = 9306,
        ERR_ExpressionTreeContainsNamedArgumentOutOfPosition = 9307,

        ERR_OperatorsMustBePublic = 9308,
        ERR_MisplacedExtension = 9309,
        ERR_OperatorMustReturnVoid = 9310,
        ERR_CloseUnimplementedInterfaceMemberOperatorMismatch = 9311,
        ERR_OperatorMismatchOnOverride = 9312,
        ERR_BadCompoundAssignmentOpArgs = 9313,

        ERR_PPShebangInProjectBasedProgram = 9314,

        ERR_TooManyUserStrings_RestartRequired = 9315,
        ERR_NameofExtensionMember = 9316,

        ERR_BadExtensionUnaryOperatorSignature = 9317,
        ERR_BadExtensionIncDecSignature = 9318,
        ERR_BadExtensionBinaryOperatorSignature = 9319,
        ERR_BadExtensionShiftOperatorSignature = 9320,
        ERR_OperatorInExtensionOfStaticClass = 9321,
        ERR_InstanceOperatorStructExtensionWrongReceiverRefKind = 9322,
        ERR_InstanceOperatorExtensionWrongReceiverType = 9323,
        ERR_ExpressionTreeContainsExtensionBasedConditionalLogicalOperator = 9324,
        ERR_InterpolatedStringHandlerArgumentDisallowed = 9325,
        ERR_MemberNameSameAsExtendedType = 9326,
        ERR_FeatureNotAvailableInVersion14 = 9327,
        ERR_UnsupportedFeatureInRuntimeAsync = 9328,
        ERR_ExtensionBlockCollision = 9329,
        ERR_MethodImplAttributeAsyncCannotBeUsed = 9330,
        ERR_AttributeCannotBeAppliedManually = 9331,
        ERR_BadSpreadInCatchFilter = 9332,
        ERR_ExplicitInterfaceMemberTypeMismatch = 9333,
        ERR_ExplicitInterfaceMemberReturnTypeMismatch = 9334,

        // HDN_RedundantPattern = 9335,  // no longer reported
        WRN_RedundantPattern = 9336,
        HDN_RedundantPatternStackGuard = 9337,

        ERR_BadVisBaseType = 9338,
        ERR_AmbigExtension = 9339,
        ERR_SingleInapplicableBinaryOperator = 9340,
        ERR_SingleInapplicableUnaryOperator = 9341,
        ERR_AmbigOperator = 9342,

        ERR_UnexpectedArgumentListInBaseTypeWithoutParameterList = 9343,
        ERR_EqualityOperatorInPatternNotSupported = 9344,
        ERR_InequalityOperatorInPatternNotSupported = 9345,
        ERR_EncUpdateRequiresEmittingExplicitInterfaceImplementationNotSupportedByTheRuntime = 9346,
        ERR_ExtensionParameterInStaticContext = 9347,
        ERR_CompilationUnitUnexpected = 9348,

        ERR_ScopedAfterInOutRefReadonly = 9349,
        ERR_InvalidModifierAfterScoped = 9350,

        ERR_StructLayoutAndExtendedLayout = 9351,
        ERR_RuntimeDoesNotSupportExtendedLayoutTypes = 9352,

        ERR_NoAwaitOnAsyncEnumerable = 9353,

        ERR_CollectionArgumentsMustBeFirst = 9354,
        ERR_CollectionArgumentsNotSupportedForType = 9355,
        ERR_CollectionArgumentsDynamicBinding = 9356,
        ERR_CollectionArgumentsMustBeEmpty = 9357,
        ERR_CollectionRefLikeElementType = 9358,
        ERR_BadCollectionArgumentsArgCount = 9359,

        ERR_UnsafeOperation = 9360,
        ERR_UnsafeUninitializedStackAlloc = 9361,
        ERR_UnsafeMemberOperation = 9362,
        ERR_UnsafeMemberOperationCompat = 9363,
        ERR_CallerUnsafeOverridingSafe = 9364,
        ERR_CallerUnsafeImplicitlyImplementingSafe = 9365,
        ERR_CallerUnsafeExplicitlyImplementingSafe = 9366,

        ERR_ExpressionTreeContainsUnionConversion = 9369,
        ERR_UnionDeclarationNeedsCaseTypes = 9370,
        ERR_NoImplicitConversionToObject = 9371,
        ERR_UnionMatchingWrongPattern = 9372,
        ERR_InstanceFieldInUnion = 9373,
        ERR_InstanceCtorWithOneParameterInUnion = 9374,
        ERR_UnionConstructorCallsDefaultConstructor = 9375,

        ERR_UnsafeConstructorConstraint = 9376,
        ERR_UnsafeMeaningless = 9377,

        ERR_PPShebangNotOnFirstLine = 9378,

        ERR_RequiresUnsafeAttributeInSource = 9379,

        ERR_ClosedTypeNameDisallowed = 9380,
        ERR_ClosedSealedStatic = 9381,
        ERR_ClosedBaseTypeBaseFromOtherAssembly = 9382,
        ERR_UnderspecifiedClosedSubtype = 9383,
        ERR_ClosedExplicitlyAbstract = 9384,

        ERR_MissingUnionCaseTypes = 9385,
        ERR_MissingUnionValueProperty = 9386,
        ERR_MemberProviderInUnionDeclaration = 9387,

        ERR_SafeModifierCannotBeUsedWithUnsafe = 9388,
        ERR_ExternMemberRequiresUnsafeOrSafe = 9389,
        ERR_PartialMemberSafeDifference = 9390,
        ERR_AbstractBaseRecordImplementation = 9391,
        ERR_ExplicitOrExtendedLayoutFieldRequiresUnsafeOrSafe = 9392,

        ERR_NoBreakId = 9393,
        ERR_NoContinueId = 9394,
        ERR_ClosedBadDerivedTypesProperty = 9395,

        ERR_InvalidPropertyUnsafeMods = 9396,
        ERR_SamePropertyUnsafeAccessorMods = 9397,

        // Note: you will need to do the following after adding errors:
        //  1) Update ErrorFacts.IsBuildOnlyDiagnostic (src/Compilers/CSharp/Portable/Errors/ErrorFacts.cs)
        //  2) Add message to CSharpResources.resx

        // Note: you will need to do the following after adding warnings:
        //  1) Re-generate compiler code (eng\generate-compiler-code.cmd).
        //  2) Update ErrorFacts.IsBuildOnlyDiagnostic (src/Compilers/CSharp/Portable/Errors/ErrorFacts.cs)
        //  3) Update ErrorFacts.GetWarningLevel (src/Compilers/CSharp/Portable/Errors/ErrorFacts.cs)
        //  4) Update DiagnosticTest.WarningLevel_2 (src/Compilers/CSharp/Test/Syntax/Diagnostics/DiagnosticTest.cs)
        //  5) Add message and '_Title' to CSharpResources.resx
    }
}