[JSC]

לסכום הספרות:

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int num1, num2;
            Console.WriteLine("enter a number between 1-9: ");
            num1 = int.Parse(Console.ReadLine());
            Console.WriteLine("enter a number between 1-9: ");
            num2 = int.Parse(Console.ReadLine());
            Console.WriteLine("the first possible number is: {0}{1}",num1,num2);
            Console.WriteLine("the second possible number is: {0}{1}", num2, num1);
            Console.WriteLine("the sum is: {0}",num1+num2);
        }
    }
}

לסכום המספרים:

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int num1, num2,sum1,sum2;
            Console.WriteLine("enter a number between 1-9: ");
            num1 = int.Parse(Console.ReadLine());
            Console.WriteLine("enter a number between 1-9: ");
            num2 = int.Parse(Console.ReadLine());
            sum1 = num1 * 10 + num2;
            sum2 = num2 * 10 + num1;
            Console.WriteLine("the first possible number is: {0}",sum1);
            Console.WriteLine("the second possible number is: {0}",sum2);
            Console.WriteLine("the sum is: {0}",sum1+sum2);
        }
    }
}