using System;

public class Calculate

{

    public static void Addition(int val1, int val2)

    {

        Console.WriteLine(val1 + val2);

    }

    public void Multiply(int val1, int val2)

    {

        Console.WriteLine(val1 * val2);

    }

    public static void Main()

    {

        Calculate.Addition(10,50);

        Calculate objCal = new Calculate();

        objCal.Multiply(10,20);                                                                                                                                                                                                                                                                                                             

    }

}

​