Mulicast delegate in C#

Mulicast delegate is a delegate that can have more than one element in its invocation list.

Example:

public delegate void MultiDelegate(int x,int y);

private class Operator
{
            public void Add(int x, int y)
       {
              MessageBox.Show ("The sum is: " + (x + y));
       }
       public void Sub(int x, int y)
       {
              MessageBox.Show("The sub is: " + (x - y));
       }
}

MultiDelegate ptr=null;

//add more than one function called multicast delegate.
ptr += new MultiDelegate(obj.Add);
ptr += new MultiDelegate(obj.Sub);
ptr(50, 10);

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