using System;

​

public class Exercise2

{

  public static void Main()

  {

     double number1,number2,number3,number4;

     Console.Write("Input number1 ="); 

     number1 = Convert.ToInt32(Console.ReadLine());

      Console.Write( "Enter number2 =");

      number2 = Convert.ToInt32(Console.ReadLine());

      Console.Write( "Enter number3="); 

      number3= Convert.ToInt32(Console.ReadLine());

     Console.Write("Enter number4 = ");

     number4 = Convert.ToInt64(Console.ReadLine());

​

     double avg= (number1 + number2 + number3 + number4) / 4;

     Console.WriteLine("Average = "+avg);

​

    }

  }

​