using System;
class clsDelegate
{	
	public delegate int simpleDelegate (int a, int b);
	public int add(int a, int b)	
	{		
		return (a+b);
	}	

	public int mul(int a, int b)	
	{		
		return (a*b);	
	}	
	static void Main(string[] args)	
	{		
		clsDelegate clsDlg = new clsDelegate();		
		simpleDelegate add = new simpleDelegate(clsDlg.add);
		simpleDelegate mul = new simpleDelegate(clsDlg.mul);		
		int addAns = add(10,12);		
		int mulAns = mul(10,10);		
		Console.WriteLine("Result by calling the add method using a delegate: {0}",addAns);		
		Console.WriteLine("Result by calling the mul method using a delegate: {0}",mulAns);		
		Console.Read();	
	}
}

using System;
namespace testWinApp
{

// 1. Define delegate.

public delegate double UnitConversion(double from);

public partial class Form1 : Form
   	 {
       	 public Form1()
       	 {
        	    InitializeComponent();
        	 }
		
		// 2. Define handler method.

       	 public static double FeetToInches(double feet)
        	 {
         	   return feet * 12;
       	 }

private void button4_Click(object sender, EventArgs e)
        	{

		// 3. Create delegate instance.

            UnitConversion doConversion = new 
							UnitConversion(FeetToInches);

		// 4. Use delegate just like a method.

            double inch = doConversion(4);
            MessageBox.Show(inch.ToString());
        }
	}
}