/// <summary>
/// 移除控件某個事件
/// </summary>
/// <param name="control">控件</param>
/// <param name="eventName">需要移除的控件名稱eg:EventClick</param>
public static void RemoveControlEvent(this Control control, string eventName)
{
  FieldInfo _fl = typeof(Control).GetField(eventName, BindingFlags.Static | BindingFlags.NonPublic);
  if (_fl != null)
  {
 object _obj = _fl.GetValue(control);
 PropertyInfo _pi = control.GetType().GetProperty("Events", BindingFlags.NonPublic | BindingFlags.Instance);
 EventHandlerList _eventlist = (EventHandlerList)_pi.GetValue(control, null);
 if (_obj != null && _eventlist != null)
   _eventlist.RemoveHandler(_obj, _eventlist[_obj]);
  }
}

private void WinRemoveControlEventTest_Load(object sender, EventArgs e)
{
  button1.RemoveControlEvent("EventClick");
}
private void button1_Click(object sender, EventArgs e)
{
  MessageBox.Show("button1_Click");
}