Multicast Delegate in C#: An Overview

A delegate in C# is a type that defines a reference to a method. A multicast delegate is a delegate that can refer to and invoke multiple methods. When a multicast delegate is invoked, it invokes all of the methods it references in the order in which they were added to the delegate.
Here is an example of using a multicast delegate in C#:

delegate void MyDelegate(string message); 
class Program 
{ 
    static void Main(string[] args) 
    { 
        MyDelegate delegate1 = new MyDelegate(Method1);
        MyDelegate delegate2 = new MyDelegate(Method2);
        MyDelegate delegate3 = new MyDelegate(Method3); 
        MyDelegate multicastDelegate = delegate1 + delegate2 + delegate3;
        multicastDelegate("Hello from the multicast delegate"); 
    } 
    static void Method1(string message) 
    { 
        Console.WriteLine("Method 1: " + message); 
    } 
    static void Method2(string message) 
    { 
        Console.WriteLine("Method 2: " + message); 
    } 
    static void Method3(string message) 
    { 
        Console.WriteLine("Method 3: " + message); 
    } 
}

Output:

Method 1: Hello from the multicast delegate 
Method 2: Hello from the multicast delegate 
Method 3: Hello from the multicast delegate

In this example, `MyDelegate` is a delegate type that refers to methods that take a string parameter and return `void`. The `delegate1`, `delegate2`, and `delegate3` variables each reference a different method. The `multicastDelegate` variable is created by adding the three delegate instances together using the `+` operator. When `multicastDelegate` is invoked, it invokes all three methods it references.

Related Topics:
Delegates in C#: An Overview
Understanding Generic and Non-Generic Delegates in C#