//defining delegate
publicdelegatevoidDelegates(int x,int y);
public class clsNew
    {
        //methods delegate will point to.
        public static  void Add(int x, int y)
        {
            MessageBox.Show("Sum:" + (x + y).ToString());
        }
        public static  void Mul(int x, int y)
        {
            MessageBox.Show("Product:" + (x * y).ToString());
        }
    }
         //using delegate
  private void btnAdd_Click(object sender, EventArgs e)
        {
       //creating delegate del which is pointing to Add() method of clsNew class
            Delegates del= new Delegates(clsNew.Add);    
       //actually this is pointing to add() method        
      del(Convert.ToInt32(txtNum1.Text), Convert.ToInt32(txtNum2.Text));
        }

        private void btnMul_Click(object sender, EventArgs e)
        {
           //creating delegate del which is pointing to Mul() method of clsNew class
            Delegates del = new Delegates(clsNew.Mul);
         //actually this is pointing to Mul() method       
         del(Convert.ToInt32(txtNum1.Text), Convert.ToInt32(txtNum2.Text));
        }

Ability of Multicasting

Delegates can point to more than one methods but the return type of those

methods should be void.

private void btnBoth_Click(object sender, EventArgs e)
        {
        //delegate pointing to Add() method
            Delegates del= new Delegates(clsNew.Add);
        //also pointing to Mul() method at the same time
            del+= new Delegates(clsNew.Mul);
      //this will invoke both Add() and Mul() method simultaneously.
    del(Convert.ToInt32(txtNum1.Text), Convert.ToInt32(txtNum2.Text));
        }