telegram - Issue on NotificatioApi C# -

i have written line of code in c# sends message telegram account, documentation says have written code below:

private void btnsend_click(object sender, eventargs e) {             var api = notificatioapi.initialize("my api hash here");             api.sendmessage("my phone number", "تست از سی شارپ"); } 

when click on btnsend sends message sent message doesn't shown in telegram. matter line of code?