Windows Phone: How to send programmatically SMS ?

Sending of SMS is a Task related action, which requires two assemblies to be referenced:

Microsoft.Phone
Microsoft.Phone.Tasks

This is very simple code which will send SMS to some specified number:

SmsComposeTask smsTask = new SmsComposeTask();
smsTask.To = "+38 7 111 222 444";
smsTask.Body = "Text specified by coding \r\n";
smsTask.Show();

And here is the result. After executing the code SMS will not be sent by some process in background. The user will have possibility to change the text or to attach some file before sending the SMS by herself.