I decided to develop an autocad plugin program with C#. However, altough I did big search on the web I couldn t find an Autocad .NET C# book. I have seen the visual basic one and bought it but I want to develop with C# so VB book is insufficent for me. So my first question is is there any Autocad.net C# book I can download. Second question is while I am developing my program I sometimes need someone to explain how to use component of Autocad .NET architecture (i.e. a class or a method of autocad) to accomplish my task. So, do you think Autocad developers network ( gold or other ) subscriptions could help me ?