AutoCAD 2006 .NET documentation

Here you can find it. Extract the help files for 2006 and look for the file acad_mgd.chm. Here's what's new: "The ObjectARX managed wrapper classes now include sophisticated selection, jig, and prompt support; complete events coverage previously only available to C++ reactors; and an application object model to give you convenient and readily discoverable access to the properties of the application, document, editor, and window objects of AutoCAD software. .NET applications can easily create dockable palettes and Tool Palettes and extend tabbed dialogs. The geometry library now includes 2D curves and support for external references has been added"...