using System;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        string cadena = "B13E745599654841172F741A662880D4";

        var guid = new Guid(cadena);

        string hex = HexStringFromBytes(guid.ToByteArray());

        Console.WriteLine(guid);

        Console.WriteLine(hex);

        Console.WriteLine();

        string TypeString = "pssh";

        string hexSystemID = HexStringFromBytes(new byte[] { 0xed, 0xef, 0x8b, 0xa9, 0x79, 0xd6, 0x4a, 0xce, 0xa3, 0xc8, 0x27, 0xdc, 0xd5, 0x1d, 0x21, 0xed });

        string hexS = "edef8ba979d64acea3c827dcd51d21ed";

        var guidSystem = new Guid(hexS);

        Console.WriteLine(hexSystemID);

        Console.WriteLine(HexStringFromBytes(guidSystem.ToByteArray()));

        Console.WriteLine();

        byte[] Type = Encoding.UTF8.GetBytes(TypeString);

        byte[] Version = new byte[] { 0x00 };

        byte[] Flags = new byte[] { 0x00, 0x00, 0x00};

        string convType = HexStringFromBytes(Type);

        string convVersion = HexStringFromBytes(Version);

        string convFlags = HexStringFromBytes(Flags);

        Console.WriteLine(convType);        

        Console.WriteLine(convVersion);

        Console.WriteLine(convFlags);

    }

    public static string HexStringFromBytes(byte[] bytes)

    {

        var sb = new StringBuilder();

        foreach (byte b in bytes)

        {

            var hex = b.ToString("x2");

            sb.Append(hex);

        }

        return sb.ToString();

    }

}