MD5 string encrypt and verify

String'i MD5 ile şifreleyip doğrulayan methodlar...

public static string MD5String(this string value)
{
  MD5 md5Hasher =MD5.Create();
  byte[] data= md5Hasher.ComputeHash(Encoding.Default.GetBytes(value));

  StringBuilder sBuilder = new StringBuilder();
  for(int i=0; i < data.Length; i++)
  {
     sBuilder.Append(data[i].ToString("x2"));
  }
  return sBuilder.ToString();
}

public static bool VerifyMD5String(this string value)
{
  string hashOfInput = MD5String(value);
  StringComparer comparer = StringComparer.OrdinalIgnoreCase;
  return 0== comparer.Compare(hashOfInput,hash) ? true : false;
}