Special class to handle Events Mask nicely

EventMask.cs

// Usage :
textBoxChangedEventMask = new EventMask(
                () => { textBox1.TextChanged += new EventHandler(textBox1_TextChanged); },
                () => { textBox1.TextChanged -= new EventHandler(textBox1_TextChanged); }
            );

//in the event code:

try
{
    textBoxChangedEventMask.Push();
    // ...
}
finally
{
    textBoxChangedEventMask.Pop();
}

public class EventMask
{
    Action hook;
    Action unHook;

    int count = 0;

    public EventMask(Action hook, Action unHook)
    {
        this.hook = hook;
        this.unHook = unHook;
    }

    public void Push()
    {
        count++;
        if (count == 1)
            unHook();
    }

    public void Pop()
    {
        count--;
        if (count == 0)
            hook();
    }
}