Many open source libraries already have .Net bindings available, a quick search can discover them. They're also packaged into assemblies or made into higher lev

Many open source libraries already have .Net bindings available, a quick search can discover them. They're also packaged into assemblies or made into higher level APIs, which sure beats copy-pasting from a webpage. There's the [P/Invoke interop assistant](http://clrinterop.codeplex.com/ http://clrinterop.codeplex.com/) which can help you create a wrapper for C APIs, and the mono team have created [Cxxi](https://github.com/mono/cxxi https://github.com/mono/cxxi), a binding generator for C++ APIs.