Restaurant and Waiter project! (WPF - Windows Mobile)

using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;

namespace Waiter.Classes
{
    static class GlobalClass
    {
        internal static int _UserID;
        internal static string _FullName;
        internal static Int16 _PermissionID;
        internal static string _Password;

        internal static string GetMd5Hash(string input)
        {
            // Create a new instance of the MD5CryptoServiceProvider object.
            MD5 md5Hasher = MD5.Create();

            // Convert the input string to a byte array and compute the hash.
            byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));

            // Create a new Stringbuilder to collect the bytes
            // and create a string.
            StringBuilder sBuilder = new StringBuilder();

            // Loop through each byte of the hashed data 
            // and format each one as a hexadecimal string.
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("X2"));
            }

            // Return the hexadecimal string.
            return sBuilder.ToString();
        }
    }
}