Multicasting

Multicasting is an excellent feature of delegates. With multicasting, you can assign more than one method to a delegate. When that delegate is executed, it runs all the methods that were assigned one after another. Using the + or += operator, you can add methods to a delegate. There is also a way to remove added methods from the delegate. To do this, you have to use the - or -= operator. Let's look at an example to understand clearly what multicasting is:

using System;

namespace MyDelegate
{
  delegate void MathFunc(ref int a);

  class Program
  {
    static void Main(string[] args)
    {
      MathFunc mf;
      int number = 10;
      MathFunc myAdd = MyMath.add5;
      MathFunc mySub = MyMath.sub3;

      mf = myAdd;
      mf += mySub;

      mf(ref number);

      Console.WriteLine($"Final number: {number}");

      Console.ReadKey();
    }
  }

  class MyMath
  {
    public...