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Forbid declaring parameters of `void` type in 'Change Signature'->"Add parameter" dialog
remove dupe string
Remove unnnecessary null suppressions in Roslyn.sln
Change Signature - add narration to removed parameters (#81321)
Change signature - update automation text when the type does not bind (#81342)
Use helper method
Update VS to use file scoped namespaces
Remove sync over async blocking in sig change