说明：  本书以实例形式介绍采用 Visual C#语言对 AutoCAD 进行二次开发的技术。全书包括基础篇和应用篇两部分，其中基础篇主要介绍 AutoCAD 开发中常见的图形对象获取、图形绘制、图形编辑等实例，应用篇主要结合实际工程问题、基于数学理论知识、采用程序设计来解决这些问题。
(This book introduces the technology of using Visual C# language to develop AutoCAD.The book consists of two parts: the basic part and the application part. The basic part mainly introduces the common examples of graph object acquisition, graph drawing and graph editing in AutoCAD development.)