I am a beginner developer and just decided to develop an own application. I have worked with C and C++ programming languages. During a search on the Internet I found a site (Ozeki C# VoIP SDK - A SIP SDK for software developers) that offered many sample programs. The programs are developed by a software called Ozeki VoIP SIP SDK. The only thing that bohters me is that C# knowledge is needed to evaluate this software and the sample programs. Could you help me how to try them without knowing C#? If you think that first I should learn C# and only then try this software then please tell me how to start? Are there any good tutorials or books I can use? I highly appreciate your help.