ASP.NET Core 3.0 will only run on .NET Core

[natemcmaster]

This change is one of several which were announced earlier today on the ASP.NET blog.

As announced on the .NET Blog earlier this month, .NET Framework will get fewer of the newer platform and language features that come to .NET Core moving forward, due to the in-place update nature of .NET Framework and the desire to limit changes there that might break existing applications. To ensure ASP.NET Core can fully leverage the improvements coming to .NET Core moving forward, ASP.NET Core will only run on .NET Core starting from 3.0. Moving forward, you can simply think of ASP.NET Core as being part of .NET Core.

Customers utilizing ASP.NET Core on .NET Framework today can continue to do so in a fully supported fashion using the 2.1 LTS release. Support and servicing for 2.1 will continue until at least August 21, 2021 (3 years after its declaration as an LTS release) in accordance with the .NET Support Policy.

For more information about porting from .NET Framework to .NET Core, see our documentation on Porting to .NET Core.

Please note that this does not affect the following:

• Microsoft.Extensions packages (such as logging, dependency injection, and config) will continue to support .NET Standard
• Entity Framework Core will continue to support .NET Standard

Please see the blog post from earlier today for more details on the motivation for this change.
Please use aspnet/AspNetCore#3753 for discussion.

[This announcement has been migrated to: dotnet/docs#14717]