```cs unsafe { OpenGL.DebugMessageCallback((source, type, id, severity, length, message, userparam

unsafe {
  OpenGL.DebugMessageCallback((source, type, id, severity, length, message, userparam) => {
      string msg = Marshal.PtrToStringAnsi(message, length);
      Console.Error.WriteLine($"[DebugMessageCallback] source: {source}, type: {type}, id: {id}, severity {severity}, length {length}, userParam {userparam}\n{msg}\n\n");
  }, (void*) 0);
}