// SumOfNumbers.cs

Console.Write("Please enter 5 numbers: ");
            int sum = 0;
            int numbers;
            for (int i = 0; i < 5; i++)
            {
                do
                {
                    string nString = Console.ReadLine();
                    bool tryParse = int.TryParse(nString, out numbers);
                    if (tryParse && i < 5)
                    {
                        Console.Write("Enter the next numbers: ");
                        break;
                    }
                    else
                    {
                        Console.Write("Invalid number entered .Try again: ");
                    }
               }  while (i < 5);
                sum += numbers;
            }
            Console.WriteLine("The sum of your numbers is : " + sum);