CMake can build C# projects, which means that you could use Qt Creator to build C# projects.

Attached you have such an Hello World C# project. It has one WinForms and one WPF demos.

Apparently cdb.exe can debug C# projects as documented at https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/debugging-managed-code

The extra mile would be to get debugging working on Linux too, with lldb and the libsosplugin.so as referenced at https://codeblog.dotsandbrackets.com/command-line-debugging-core-linux/