I am trying to make a program that converts a decimal into hexadecimal. It works in the sense that it returns the correct int's but how do I cast my int's that are between 10-15 to A-F as a string. Here is my code:
Code:
static void Main(string[] args)
        {
            Console.WriteLine("I will convert a number you input into Hexidecimal format.");
            Console.Write("Enter your number:");
            int yourNum = Int32.Parse(Console.ReadLine());

            int hexNum1, hexNum2, hexNum3, hexNum4, hexNum5;

            if (yourNum < 65535)
            {
                hexNum1 = 0;
            }
            else 
                hexNum1 = yourNum / 65535;

            int rem1 = yourNum % 65535;

            if (rem1 < 4096)
            {
                hexNum2 = 0;
            }
            else
                hexNum2 = rem1 / 4096;

            int rem2 = rem1 % 4096;

            if (rem2 < 256)
            {
                hexNum3 = 0;
            }
            else
                hexNum3 = rem2 / 256;

            int rem3 = rem2 % 256;
            if (rem3 < 16)
            {
                hexNum4 = 0;
            }
            else
                hexNum4 = rem3 / 16;

            int rem4 = rem3 % 16;
            if (rem4 < 1)
            {
                hexNum5 = 0;
            }
            else
                hexNum5 = rem4 / 1;

            switch (hexNum1)
            {
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                case 8:
                case 9:
                    hexNum1.ToString();
                    break;
                case 10:
                    hexNum1.ToString();
                    break;
                case 11:
                    hexNum1.ToString();
                    break;
                case 12:
                    hexNum1.ToString();
                    break;
                case 13:
                    hexNum1.ToString();
                    break;
                case 14:
                    hexNum1.ToString();
                    break;
                case 15:
                    hexNum1.ToString();
                    break;
                default:
                    hexNum1.ToString();
                    break;
            }

            switch (hexNum2)
            {
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                case 8:
                case 9:
                    hexNum2.ToString();
                    break;
                case 10:
                    hexNum2.ToString();
                    break;
                case 11:
                    hexNum2.ToString();
                    break;
                case 12:
                    hexNum2.ToString();
                    break;
                case 13:
                    hexNum2.ToString();
                    break;
                case 14:
                    hexNum2.ToString();
                    break;
                case 15:
                    hexNum2.ToString();
                    break;
                default:
                    hexNum2.ToString();
                    break;
            }

           
            switch (hexNum3)
            {            
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                case 8:
                case 9:
                    hexNum3.ToString();
                    break;
                case 10:
                    hexNum3.ToString();
                    break;
                case 11:
                    hexNum3.ToString();
                    break;
                case 12:
                    hexNum3.ToString();
                    break;
               
                case 13:
                    hexNum3.ToString();
                     
                    break;
                case 14:
                    hexNum3.ToString();
                    break;
                case 15:
                    hexNum3.ToString();
                    break;
                default:
                    hexNum3.ToString();
                    break;
                    
            }
            


            switch (hexNum4)
            {
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                case 8:
                case 9:
                    hexNum4.ToString();
                    break;
                case 10:
                    hexNum4.ToString();
                    break;
                case 11:
                    hexNum4.ToString();
                    break;
                case 12:
                    hexNum4.ToString();
                    break;
                case 13:
                    hexNum4.ToString();
                    break;
                case 14:
                    hexNum4.ToString();
                    break;
                case 15:
                    hexNum4.ToString();
                    break;
                default:
                    hexNum4.ToString();
                    break;
            }

            switch (hexNum5)
            {
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                case 8:
                case 9:
                    hexNum5.ToString();
                    break;
                case 10:
                    hexNum5.ToString();
                    break;
                case 11:
                    hexNum5.ToString();
                    break;
                case 12:
                    hexNum5.ToString();
                    break;
                case 13:
                    hexNum5.ToString();
                    break;
                case 14:
                    hexNum5.ToString();
                    break;
                case 15:
                    hexNum5.ToString();
                    break;
                default:
                    hexNum5.ToString();
                    break;
            }

          


           Console.WriteLine("Your number in Hex is:{0}, {1}, {2}, {3}, {4}", hexNum1, hexNum2, hexNum3, hexNum4, hexNum5 );
           Console.ReadLine();

        }
    }
}