AutoCAD .NET Developer's Guide

This is really great news! I have reviewed a lot of the guide and can testify that it will be useful for many.

This guide provides information on how to use the AutoCAD .NET API with Microsoft Visual Studio and the programming languages VB.NET and C#. Information specific to developing applications using Microsoft Visual Studio can be found under the topics “Getting Started with Microsoft Visual Studio” and “Develop Applications with Microsoft Visual Studio.”
Programmers developing with the .NET Framework using a development environment other than Microsoft Visual Studio can skip these two chapters. However, all of the example code in this guide is presented in VB.NET and C#.

You can access the AutoCAD .NET Developer’s Guide online:
http://www.autodesk.com/autocad-net-developers-guide


Introduction

Getting Started with Microsoft Visual Studio

Basics of the AutoCAD .NET API

Control the AutoCAD Environment

Create and Edit AutoCAD Entities

Dimensions and Tolerances

Work in Three-Dimensional Space

Define Layouts and Plot

Use Events

Develop Applications with VB.NET and C#

VBA/VB to VB.NET and C# Comparison

VBA to VB.NET and C# Comparison

AutoCAD .NET Developer's Guide

Here is also some great screencasts from Microsoft.