DllImport is no longer recommended as it is unfriendly to tree shaking and requires extra runtime support. The replacement is LibraryImport, but that requires a source generator that is only available to C#. Therefore, languages like F# do not support it, and it is not clear how they should support it.

This is a request to document what the actual tree-shaking-friendly runtime primitive is, so that source language compilers know what code they need to emit. This is a prerequisite for tree-shaking-friendly FFI in languages other than C#.