C#中删除控件的事件的方法类

        /// <summary>
        /// 删除指定控件的指定事件
        /// </summary>
        /// <param name="control"></param>
        /// <param name="eventname"></param>
        public void ClearEvent(System.Windows.Forms.Control control, string eventname)
        {
            if (control == null) return;
            if (string.IsNullOrEmpty(eventname)) return;

            BindingFlags mPropertyFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static | BindingFlags.NonPublic;
            BindingFlags mFieldFlags = BindingFlags.Static | BindingFlags.NonPublic;
            Type controlType = typeof(System.Windows.Forms.Control);
            PropertyInfo propertyInfo = controlType.GetProperty("Events", mPropertyFlags);
            EventHandlerList eventHandlerList = (EventHandlerList)propertyInfo.GetValue(control, null);
            FieldInfo fieldInfo = (typeof(System.Windows.Forms.Control)).GetField("Event" + eventname, mFieldFlags);
            Delegate d = eventHandlerList[fieldInfo.GetValue(control)];

            if (d == null) return;
            EventInfo eventInfo = controlType.GetEvent(eventname);

            foreach (Delegate dx in d.GetInvocationList())
                eventInfo.RemoveEventHandler(control, dx);

        }