System.ConsolePal.ControlCHandlerRegistrar.Unregister C# (CSharp) Method

            internal void Unregister()
            {
                Debug.Assert(_handlerRegistered);

                bool r = Interop.Kernel32.SetConsoleCtrlHandler(_handler, false);
                if (!r)
                {
                    throw Win32Marshal.GetExceptionForLastWin32Error();
                }
                _handlerRegistered = false;
            }