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Enforce warnings for unused usings (#39280)
Add client span to SignalR .NET client (#57101)
Enable throw helper analyzers (#45954)
Treat all ProjectRefs to SharedFx projects as PrivateAssets=all (#64863)
Use file scoped namespaces (#38076)
Propagate trace parent to SignalR hub invocations (#57049)
Rename Microsoft.Aspnetcore.Testing to Microsoft.AspNetCore.InternalTesting (#51713)