I have contentedly used VB.NET with AutoCAD 2002 and 2004. Now with AutoCAD 2005, when I reference the AutoCAD 2005 Type Library, the Object Structure has changed. With AutoCAD 2004 I had the Assembly, Interop.AutoCAD and one Namespace AutoCAD. With AutoCAD 2005 I have the Assembly, Autodesk.AutoCAD.Interop and three Namespaces. Autodesk and Autodesk.AutoCAD are empty and Autodesk.AutoCAD.Interop contains a subset of classes. This does not include any of the primitive classes. Can anybody tell me what I should be doing, please?