1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:

private readonly object myEventLock = new object();
private EventHandler myEvent;

public event EventHandler MyEvent
{
    add
    {
        lock (myEventLock)
        {
            myEvent += value;
        }
    }
    remove
    {
        lock (myEventLock)
        {
            myEvent -= value;
        }
    }
}

protected void OnMyEvent(EventArgs args)
{
    lock (myEventLock)
    {
        foreach (EventHandler eventHandler in myEvent.GetInvocationList())
        {
            ISynchronizeInvoke target = eventHandler.Target as ISynchronizeInvoke;

            if ((target != null) && (target.InvokeRequired))
            {
                target.Invoke((MethodInvoker)delegate()
                {
                    eventHandler(this, args);
                }, null);
            }
            else
                eventHandler(this, args);
        }
    }
}