using System;

​

namespace ConsoleApplication1

{

    public class Program

    {

        public static void Main(string[] args)

        {

            var value = 12288092688749907974u;

            var bytes = BitConverter.GetBytes(value);

​

            Console.Write(BitConverter.IsLittleEndian ? "IsLittleEndian Yes" : "IsLittleEndian No");

            Console.WriteLine(" Value " + BitConverter.ToString(bytes));

​

            Array.Reverse(bytes);

            Console.Write(BitConverter.IsLittleEndian ? "IsLittleEndian No" : "IsLittleEndian Yes");

            Console.WriteLine(" Value " + BitConverter.ToString(bytes));

​

            Console.Read();

        }

    }

}

​