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Verify MVC / Razor Pages support for unions (#67005)
Use file scoped namespaces (#38076)
Changed default server for samples from IIS Express to Kestrel (#29517)
Treat all ProjectRefs to SharedFx projects as PrivateAssets=all (#64863)
chore : Remove unwanted `using` statement (#39176)
Replace WebHostBuilder with HostBuilder pattern in MVC folder (#62703)
Reorganize source code in preparation to move into aspnet/AspNetCore Prior to reorganization, this source code was found in https://github.com/aspnet/Mvc/tree/c9887e027a97b07a3ae7699112b9a2620a36e553