Hello again alt

Happy to report that once the source of the little bug have been identified,
i was able to write a fully functional, fully async, SMPP client in a few hours,
whit some 300 lines of code.

You have got a new client ;-)

Hello alt.

I can confirm that the .ExpireIn is the source of the bug:


ISubmitSmBuilder builder = SMS.ForSubmit()
.From(sourceAddress)
.To(destinationAddress)
.Coding(coding)
.Text(_messageText)
//.ExpireIn(TimeSpan.FromDays(7)) // <= BUG
//.ExpireIn(TimeSpan.FromMinutes(1440)) // <= BUG ...

I am trying to use your SmppClientDemo and i get an exception when sending a SMPP request.
The app. connects but it doesn't send anything when pressing the Submit button and we get that Exception:

14:44:02.989: Error (SmppClient1) Failed to send SMPP Request., Exception: System ...