using System;

public class Program

{

    public static void Main()

    {

          int a, b, c, d;

​

            b = 2;

            c = 78;

            d = 20;

            a = b + d;

​

            Console.WriteLine("==============================================");

            Console.WriteLine();

​

            Console.WriteLine("The variable a is " +a+ ".");

            Console.WriteLine();

​

            Console.WriteLine("The variable b is " +b+ ".");

            Console.WriteLine();

​

            Console.WriteLine("The variable c is " +c+ ".");

            Console.WriteLine();

​

            Console.WriteLine("The variable d is " +d+ ".");

            Console.WriteLine();

​

            Console.WriteLine("2 times a, c=a plus b, a=20");

            Console.WriteLine();

​

            Console.WriteLine("==============================================");

            Console.WriteLine();

​

            Console.ReadLine();

    }

}