Add support managed IL static link library

[John0King]

current dotnet only support dynamic link library , but for some util class or internal used library , for a library author it must introduce a nuget dependency , and also find in this repo(eg. dotnet/runtimes) , there is a ~/Commons folder for the BCL library to use, I wonder can dotnet also support static linking ?

this is something that I thought

• default is internal for static library.
• add export [<assemblyName/alais>:]<Type> [as <NewTypeName>] expression to export static link library class/method/fields etc into current assembly.
• nuget support

[hez2010]

Static linking simply doesn't work in dotnet libraries because you must provide your class libraries as assemblies.
But the final artifact of your project can be statically linked.
If you are looking for a managed variant of statically linking, you can checkout ILLink(Trimming)+SingleFile publish.
If you are looking for a native variant, then you can checkout https://github.com/dotnet/runtime/blob/main/src/coreclr/nativeaot/docs/interop.md

[John0King]

Static linking simply doesn't work in dotnet libraries because you must provide your class libraries as assemblies.

that's ture , but this is a idea for dotnet that may be impliement in the future.

I hope can specify <OutputType>ILStaticLibrary</OutputType> and the project produce a xxxx.libil
and for the implimentation, the worset implimentation is simply pack the source code into a "zip" file, and better way it to pick the IL class into the assembly that reference this "ILStaticLibrary" , the different from ILLIink is that all the public type in static link library should modify to internal and then merge to the "assembly" that reference it ( you can then export in the "assembly" and then the type will be a public type in "assembly")

[jkotas]

If you would like to, it is possible to package your component as sources. There are a few packages like that out there. For example, https://www.nuget.org/packages/xunit.assert.source . It is a bit involved to set it up, but it is certainly possible.