support `.csproj` as well?

if we had to support `.csproj` files in a similar way, what changes would be required? is it fundamental changes?
.csproj files usually load C# files even if not specified (no Include) so i guess in a way is a bit different, or would it be ok to retrigger assembly recompilation? so kind of to reuse #r .dll and kind of search for all assemblies in the bin solution and reference them as well?

Review the existing fsproj support and the proposed .csproj behavior, especially implicit C# file inclusion, #r .dll references, and assemblies in the bin solution. Determine whether assembly recompilation or broader assembly discovery is required. Done means the scope and implementation approach for .csproj support are decided and documented.

Written by the indexing model from the issue text.