ارور در کد نویسی

حسین موسالو

سلام

Console.WriteLine("Please Enter Number 1 :");
            string number1 = Console.ReadLine();
      
      Console.WriteLine("Please Enter Number 2 :");
            string number2 = Console.ReadLine();

            int num1 = Convert.ToInt32(number1);
            int num2 = Convert.ToInt32(number2);

            int sum = num1 + num2;
            Console.WriteLine("Sum is : " + sum);

            Console.ReadKey();