CRYPTOGRAFIA MD5 DE ARQUIVO XML

        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([Ô]x2[Ô]));
            }

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

        static bool verifyMd5Hash(string input, string hash)
        {
            // Hash the input.
            string hashOfInput = getMd5Hash(input);

            // Create a StringComparer an comare the hashes.
            StringComparer comparer = StringComparer.OrdinalIgnoreCase;

            if (0 == comparer.Compare(hashOfInput, hash))
            {
                return true;
            }
            else
            {
                return false;
            }
        }

if (verifyMd5Hash([Ô]ARNALDOCRUZ[Ô], [Ô]3f43607d8b36d164f7f6535622493ea9[Ô]) == false)
{
    MessageBox.Show([Ô]HASH não é válido !![Ô]);
}
else
{
    MessageBox.Show([Ô]HASH é válido !!![Ô]);