I am a C# dev. As much as I love working on Linux, how can I contribute to Linux itself. Gnome default userland killed the last C# based apps years ago when I r

I am a C# dev. As much as I love working on Linux, how can I contribute to Linux itself. Gnome default userland killed the last C# based apps years ago when I remember right. All meaningful work (stuff which goes upstream) is in C++ ... a language where I have no joy writing code in.