Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

What type of delegate allows combining multiple methods for invocation?

1. Single-cast Delegate

2. Multicast Delegate

3. Generic Delegate

4. Action Delegate

The correct answer is: Multicast Delegate

A multicast delegate is a type of delegate in .NET that is designed to hold references to multiple methods, allowing for their invocation in a single call. When a multicast delegate is invoked, it sequentially calls each method it references, making it ideal for scenarios where multiple methods need to execute in response to a single event or action. This feature is particularly useful in event handling, where you may want to trigger various responses in different parts of your application when a specific event occurs. By utilizing a multicast delegate, you can easily aggregate all the methods you want to invoke and call them together without needing to manage the invocation of each method independently. In contrast, a single-cast delegate only references a single method, thus cannot combine multiple methods for invocation. A generic delegate is a customizable type that can work with different data types but doesn't inherently provide the capability to combine methods. An action delegate, while useful for encapsulating methods that return void, does not specifically denote the ability to hold multiple methods for invocation like a multicast delegate does.