Use this tag for questions specifically related to ASP.NET Core 3.0, in addition to using the 'ASP.NET Core' tag.
This release features compatibility with .NET Core 3.0, support for C# 8.0, and support in Visual Studio 2019 and Visual Studio Code.
See the tag asp.net-core for more information or What's new in ASP.NET Core 3.0.
Also see a migration guideline from ASP.NET Core 2.2.
