如何在方法

Question

我有一个活动

public event EventHandler<MyEventArgs> OnMyEvent;

我想在我的方法中订阅此事件，拦截触发该事件的事件并取消订阅该事件。

该代码不起作用...

    private string InterceptMessage()
    {
        EventHandler<MyEventArgs> handler = null;
        string message_intercepted = null;

        handler = (sender, e) =>
        {
            message_intercepted = e.Message;
            OnMyEvent -= handler;
        };

        OnMyEvent += handler;

        return message_intercepted;
    }