程序:
public class Control
{
    public delegate void SomeHandler(object sender, System.EventArgs e);
    public event SomeHandler SomeEvent;
    public Control()
    {
        this.SomeEvent += new SomeHandler(this.ProcessSomeEvent);
    }
    public void RaiseSomeEvent()
    {
        EventArgs e = new EventArgs();
        Console.Write("Please input 'a':");
        string s = Console.ReadLine();
        if (s == "a")
        {
           SomeEvent(this, e);
        }
    }
    private void ProcessSomeEvent(object sender, EventArgs e)
    {
        Console.WriteLine("hello");
    }
}
class Container
{
    private Control ctrl = new Control();
    public Container()
    {
        ctrl.SomeEvent += new Control.SomeHandler(this.ResponseSomeEvent);
        ctrl.RaiseSomeEvent();
    }
    public static void Main()
    {
        Container pane = new Container();
        Console.ReadLine();
    }
    private void ResponseSomeEvent(object sender, EventArgs e)
    {
        Console.WriteLine("Some event occur!");
    }
}

其输出:
please input 'a':a
hello
Some event occur!

问题是当输入a后为什么先输出hello,而不是Some event occur!呢?
望达人解答!!!![bc02]

不会吧,没有人帮我吗?

就因为你的SomeEvent事件先注册ProcessSomeEvent方法

如果想测试 你把
this.SomeEvent += new SomeHandler(this.ProcessSomeEvent);这一句放到你的RaiseSomeEvent方法中就能看出效果

楼上答这么好,我就不献丑了