Is C# System.Thread using the Win32 API?

Question

Is the C# Mulithreading with System.Thread using the Win32 API or how is System.Thread working?

Answer 1

System.Thread threads are Dot Net runtime managed threads which are different from native win32 threads.

C# or Dot Net managed threads are managed by the Dot Net runtime and when in a running state are backed by native threads. But there is no direct 1 to 1 correlation between the Dot Net runtime managed threads and native threads. For example the native thread used to back a managed thread may be different on when it resumes after a context switch