public void OnBackKeyPressed(CancelEventArgs args)
{
#if LOG_REGISTRATION
TLUtils.WriteLog("SignInViewModel.OnBackKeyPressed");
#endif
if (IsWorking)
{
args.Cancel = true;
IsWorking = false;
MTProtoService.CancelSignInAsync();
MTProtoService.ClearHistory("SignInViewModel", false);
NotifyOfPropertyChange(() => CanSignIn);
}
}