using System;

public class Program

{

    public static void Main()

    {

        // 16-byte encoded, from users db.guid

        Byte[] bytes = StringToByteArray("B7CD3FE228571D4194FE4E498AD00EA3");

​

        // Create guidA  using these bytes

        Guid guid_a = new Guid(bytes);

        // Text string from user page

        string guid_b = "e23fcdb75728411d94fe4e498ad00ea3";

        // The ToString("N") remove the hyphens

        Console.WriteLine("A:{0}\nB:{1}\n", guid_a.ToString("N"), guid_b);

    }

    // Function to pack a string of hex to byte array

    public static byte[] StringToByteArray(String hex)

    {

        int NumberChars = hex.Length;

        byte[] bytes = new byte[NumberChars / 2];

        for (int i = 0; i < NumberChars; i += 2)

            bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);

        return bytes;

    }

}