protected override void CheckToken(string pureToken, string state)
{
SystemWebAntiForgery.Validate(pureToken, state);
}
protected override void GenerateTokens(string existingToKeepToken, out string toSend, out string toKeep)
{
SystemWebAntiForgery.GetTokens(existingToKeepToken, out toKeep, out toSend);
toKeep = toKeep ?? existingToKeepToken; // toKeep == null if the existing token is A-OK
}