/// <summary>
/// Decrypts identifiers that come back from client.
/// Private helper method.
/// </summary>
/// <param name="sid">Stringified, encrypted identifier.</param>
/// <returns>Internal identifier.</returns>
private int DecryptId(string sid)
{
string s = Crypto.ActionDecrypt(sid);
s = s.Substring(0, s.IndexOf("|"));
return(int.Parse(s));
}