using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Would you like to add ( enter +) or subtract (enter - )");

        string operation = Console.ReadLine();

        if (operation != "+" && operation != "-") {

            Console.WriteLine("Please enter one of the signs!!!");

      }

        Console.WriteLine("Enter your first number");

        string numberOne = Console.ReadLine();

        Console.WriteLine("Enter your second number");

        string numberTwo = Console.ReadLine();

        Double num1 = Convert.ToDouble(numberOne);

        Double num2 = Convert.ToDouble(numberTwo);

        Double Total = num1 + num2;

        Double Total2 = num1 -num2;

        if (operation == "+")  {

        Console.WriteLine(num1 + "+" + num2 + "=" + Total);

        }

        else {

            Console.WriteLine(num1 + "-" + num2 + "=" + Total2);

        }

​

    }

}