using System;

​

class Math{

    private int num1;

    private int num2;

    public int Num1{

        get{return num1;

        }

        set{

            num1 = value;

        }

    }

    public int Num2{

        get{return num2;

        }

        set{

            num2 = value;

        }

    }

    public void PrintAdd(){

        Console.WriteLine(Num1+" + "+Num2+" = "+(Num1+Num2));

}

}

public class Program

{

    public static void Main()

    {

        Math group1 = new Math();

        group1.Num1 = 10;

        group1.Num2 = 20;

        group1.PrintAdd();

    }

}