byte[] から int などのデータ型に変換する

namespace Tips_BitConverter

{

    using System;

    class Program

    {

        static void Main(string[] args)

        {

            byte[] bytes;

            int int32;

            // 0x78563412

            bytes = new byte[] { 0x12, 0x34, 0x56, 0x78 };

            int32 = BitConverter.ToInt32(bytes, 0);

            Console.WriteLine("int32 = 0x{0}", int32.ToString("X8"));

            // 0x12345678

            bytes = new byte[] { 0x78, 0x56, 0x34, 0x12 };

            int32 = BitConverter.ToInt32(bytes, 0);

            Console.WriteLine("int32 = 0x{0}", int32.ToString("X8"));

            Console.ReadKey();

        }

    }

}