Infrastructure of Mono is not in any way comparable to proper c#. Also how come MonoDevelop's latest version doesn't work on Linux? On Windows it became Xamaria

Infrastructure of Mono is not in any way comparable to proper c#. Also how come MonoDevelop's latest version doesn't work on Linux? On Windows it became Xamarian and it is ok ish, but I would not use it for a major project, refactoring tools are more or less non existant. On Linux they are stuck with the old version of MonoDevelop