Question

Evil or not evil?

public static void Raise(this EventHandler handler, object sender, EventArgs args) {    if (handler != null)    {       handler(sender, args);    } }  // Usage: MyButtonClicked.Raise(this, EventArgs.Empty);  // This works too! Evil? EventHandler handler = null; handler.Raise(this, EVentArgs.Empty); 

Note that due to the nature of extension methods, MyButtonClicked.Raise will not throw a NullReferenceException if MyButtonClicked is null. (E.g. there are no listeners to MyButtonClicked event).

Evil or not?

Answer 1

Not evil. I wish events worked this way by default. Can someone explain why an event with no subscribers is null?