title: OpenSource .net SMS library, I can't seem to find one at all for C#
body: <p>I've been using GSM modems in my projects to <strong>send/recieve</strong> SMS-s. I have been using built-in serial port communication features of <strong>.net</strong> to do this by using standard AT commands.</p>
  
  <p>Now I have to extend its functionality (like SMSs in PDU mode, more efficient delivery report handling etc). I don't wanna reinvent the wheel, so first I'd like to know if there is a good open source project or a free library on this topic. It should send/recieve sms in text and pdu mode, handle delivery reports.</p>
  
  <p>I've googled it, but I have not found an efficient one so far.</p>
  
  <p>Platform:
  <strong>Windows/.net4/vs2010/c#</strong></p>