using System;

using System.Linq;

using System.Runtime.InteropServices;

public class Program

{

    public static void Main()

    {

        var x = StringToByteArray("B400000000000000C4FFFFFF000002000600040017003B003B00E70300000A000600020017003B003B00E703");

        TZI z = Parse(x);

        Console.WriteLine(z.daylightDate);

    }

    public static TZI Parse(byte[] info)

    {

        TZI tzi = new TZI();

        if (info.Length != Marshal.SizeOf(tzi))

        {

            throw new ArgumentException(string.Format("Byte object must be of size {0}, got {1}", Marshal.SizeOf(tzi), info.Length));

        }

​

        // Could have sworn there's a Marshal operation to pack bytes into

        // a structure, but I can't see it. Do it manually.

​

        GCHandle h = GCHandle.Alloc(info, GCHandleType.Pinned);

​

        try

        {

            return (TZI)Marshal.PtrToStructure(h.AddrOfPinnedObject(), typeof(TZI));

        }

        finally

        {

            h.Free();

        }

    }

    public static byte[] StringToByteArray(string hex) {

        return Enumerable.Range(0, hex.Length)

                     .Where(x => x % 2 == 0)

                     .Select(x => Convert.ToByte(hex.Substring(x, 2), 16))

                     .ToArray();

    }

    [StructLayout(LayoutKind.Sequential)]

    public struct TZI

    {

        public int bias;

        public int standardBias;

        public int daylightBias;

        public SystemTime standardDate;

        public SystemTime daylightDate;

    }

    public struct SystemTime

    {

        char wYear;

        char wMonth;

        char wDayOfWeek;

        char wDay;

        char wHour;

        char wMinute;

        char wSecond;

        char wMilliseconds;

    }

}