Suspend Process in C#

 [Flags]
    public enum ThreadAccess : int
    {
      TERMINATE = (0×0001),
      SUSPEND_RESUME = (0×0002),
      GET_CONTEXT = (0×0008),
      SET_CONTEXT = (0×0010),
      SET_INFORMATION = (0×0020),
      QUERY_INFORMATION = (0×0040),
      SET_THREAD_TOKEN = (0×0080),
      IMPERSONATE = (0×0100),
      DIRECT_IMPERSONATION = (0×0200)
    }

    [DllImport("kernel32.dll")]
    static extern IntPtr OpenThread(ThreadAccess dwDesiredAccess, bool bInheritHandle, uint dwThreadId);
    [DllImport("kernel32.dll")]
    static extern uint SuspendThread(IntPtr hThread);
    [DllImport("kernel32.dll")]
    static extern int ResumeThread(IntPtr hThread);

    private void SuspendProcess(int PID)
    {
      Process proc = Process.GetProcessById(PID);

      if (proc.ProcessName == string.Empty)
        return;

      foreach (ProcessThread pT in proc.Threads)
      {
        IntPtr pOpenThread = OpenThread(ThreadAccess.SUSPEND_RESUME, false, (uint)pT.Id);

        if (pOpenThread == IntPtr.Zero)
        {
          break;
        }

        SuspendThread(pOpenThread);
      }
    }

    public void ResumeProcess(int PID)
    {
      Process proc = Process.GetProcessById(PID);

      if (proc.ProcessName == string.Empty)
        return;

      foreach (ProcessThread pT in proc.Threads)
      {
        IntPtr pOpenThread = OpenThread(ThreadAccess.SUSPEND_RESUME, false, (uint)pT.Id);

        if (pOpenThread == IntPtr.Zero)
        {
          break;
        }

        ResumeThread(pOpenThread);
      }
    }

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