NumericConvertions

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication8
{
    class NumberConvertions
    {
        static void Main(string[] args)
        {
            // http://stackoverflow.com/questions/74148/how-to-convert-numbers-between-hexadecimal-and-decimal-in-c
            // To convert from Decimal to Hex do...
            Console.WriteLine("Моля въведете число");
            int decValue = Convert.ToInt32(Console.ReadLine());
            string hexValue = decValue.ToString("X");
            //Convert.ToInt64(hexValue, 16);
            Console.WriteLine(hexValue);


            // To convert from Hex to Decimal do either...
            int decValue2 = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
            Console.WriteLine(decValue2);
            //string.format("{0:x}", decValue);

            // http://stackoverflow.com/questions/2954962/decimal-to-binary-conversion-in-c
            // To convert from Decimal to Binary do...
            string binary = Convert.ToString(decValue, 2);
            Console.WriteLine(binary);

            // To convert from Binary to Decimal do either..
            // http://stackoverflow.com/questions/2954962/decimal-to-binary-conversion-in-c
            long l = Convert.ToInt64(binary, 2);
            Console.WriteLine(l);

            // Binary to Hex
            // http://stackoverflow.com/questions/5612306/converting-long-string-of-binary-to-hex-c-sharp

            // Hex to binary
            string binarystring = String.Join(String.Empty, hexValue.Select(
            c => Convert.ToString(Convert.ToInt32(c.ToString(), 16), 2).PadLeft(4, '0')));
            Console.WriteLine(binarystring);

        }
    }
}