[Freeswitch-dev] Using of .NET, SIP-TCP

Hi all, I want to use freeswitch with .NET and I see there is already a freeswitch.NET interface. But I'm new with freeswitch and I dont know how to use freeswitch in any language. Has anyone code snippets to make a call to/from an SIP-Device from/to a PC running Freeswitch (with soundcard and headset)? I've tried to configure something but I found nothing to simple use freeswitch.dll to call a SIP-Device. And btw: How can I configure SIP-Stack to use TCP? I inserted <param name="transport" value="tcp"/> in the sofia.conf settings section but no change (only UDP). Thanks for your help, Thomas