private delegate int DEL_TEST_EventHandler(int m, int n);
private event DEL_TEST_EventHandler DelTestEventHandler;
/// <summary>
/// 移除所有的事件綁定
/// </summary>
/// <param name="clearEvent"></param>
private void clear_event(DEL_TEST_EventHandler clearEvent)
{
 Delegate[] dels = DelTestEventHandler.GetInvocationList();
 foreach (Delegate d in dels)
 {
  //得到方法名
  object delObj = d.GetType().GetProperty("Method").GetValue(d, null);
  string funcName = (string)delObj.GetType().GetProperty("Name").GetValue(delObj, null);
    Debug.Print(funcName);
  DelTestEventHandler -= d as DEL_TEST_EventHandler;
 }
}
//測試主函數
private void test()
{
 DelTestEventHandler += add;
 DelTestEventHandler += sub;
   DelTestEventHandler += add;
 DelTestEventHandler += sub;
   clear_event(DelTestEventHandler);
}
private int add(int m, int n)
{
 return m + n;
}
private static int sub(int m, int n)
{
 return m - n;
}