using System;

public class Program

{

    static int a = 10;

    static int b = 2;

    static int c = 0;

    public static int Sum(){

        int c = a + b;

        return c;

    }

    public void Add(int x, int y){

        int z = x +y;

        Console.WriteLine("Afer addition value is {0} ", z);

​

    }

    public int  Add(int x, int y, int z){

        int w = x +y + z;

        return w;

​

    }

    public static void Main()

    {

        Console.WriteLine("Sum is {0} ", Sum());

        Program p = new Program();

        p.Add(5, 5);

        Console.WriteLine(p.Add(5, 5, 5));

    }

}