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What are multicasting delegates in C#?
A delegate that holds a reference to more than one method is called multicasting delegate.
Let us see an example −
Example
using System;
delegate void myDelegate(int val1, int val2);
public class Demo {
public static void CalAdd(int val1, int val2) {
Console.WriteLine("{0} + {1} = {2}", val1, val2, val1 + val2);
}
public static void CalSub(int val1, int val2) {
Console.WriteLine("{0} - {1} = {2}", val1, val2, val1 - val2);
}
}
public class Program {
static void Main() {
myDelegate d = new myDelegate(Demo.CalAdd);
d += new myDelegate(Demo.CalSub);
d(45, 70);
d -= new myDelegate(Demo.CalAdd);
d(95, 70);
d += new myDelegate(Demo.CalSub);
d(88, 6);
d -= new myDelegate(Demo.CalAdd);
d(40, 20);
Console.Read();
}
}In the above example, our delegate is −
delegate void myDelegate(int val1, int val2);
Using the following, we have set a reference to more than one method in delegates i.e. CalAdd() and CalSub() −
myDelegate d = new myDelegate(Demo.CalAdd); d += new myDelegate(Demo.CalSub); d(45, 70); d -= new myDelegate(Demo.CalAdd); d(95, 70); d += new myDelegate(Demo.CalSub); d(88, 6); d -= new myDelegate(Demo.CalAdd); d(40, 20);
Updated on: 20-Jun-2020
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