Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

What does Multicasting allow you to do with delegates?

1. Add additional methods to invocation lists

2. Chain multiple event handlers

3. Invoke methods in an asynchronous manner

4. Create new delegates without references

The correct answer is: Add additional methods to invocation lists

Multicasting allows you to have a single delegate reference that can hold multiple method references. This is particularly useful in scenarios where you want to execute several methods in response to a single event. By adding multiple methods to the invocation list of a delegate, you can call all the methods in the list sequentially when the delegate is invoked. This characteristic of multicast delegates is foundational in event handling, where multiple event handlers can respond to a single event notification. For instance, if you have a button click event, you can attach various methods that should react when the button is clicked without creating separate delegate instances for each method. While chaining event handlers does relate to multicasting, the core feature here is the ability to add multiple method references to the same delegate. This is why the option regarding adding additional methods to invocation lists is the most accurate description of what multicasting allows you to do with delegates. Other options, such as invoking methods asynchronously or creating new delegates without references, do not accurately capture the essence of multicasting with delegates.