using System;

class Math

{

private int num1;

private int num2;

public void Add()

{

Console.WriteLine(num1+num2);

}

public int Num1 //ENCAPSULATION

{

set//set property//get accessor (for write only)

    {

     num1=value;

    Console.WriteLine(num1);

   } 

}

​

public  int Num2

{

set//set property//get accessor (for write only)

    {

     num2=value;

    Console.WriteLine(num2);

​

      }

   }    

​

}

​

​

public class Program

{

    public static void Main()

    {

    Math group1 = new Math();

        group1.Num1=20;

        group1.Num2=10;

        group1.Add();

    }

}