There are several packages in dotnet/corefx where the package and supporting language features are mature and no longer evolving, and where the risk of code change likely exceeds the benefit. Those packages should be effectively archived.

Packages:

• Microsoft.CSharp
• Microsoft.VisualBasic
• System.Dynamic
• System.Linq.Expressions

When archived, we would not accept features contributions to the packages. We would consider changes that address significant bugs or regressions, or changes that are necessary to continue shipping the binaries. Other changes will be rejected.

There is one exception: Microsoft.VisualBasic is currently being ported to .NET Core and we will continue to accept contributions that are within the scope of the porting effort.

README.md files will be added to the root of each affected package.