说明：  ArcEngine+C# TIN相关三维功能模块,现在的打算是将其按写成一个小的系列，每个系列涉及一些紧密联系的功能，最后将所涉及的内容整合到一个程序中，以便更好的理解，希望能对刚刚接触这块的朋友一点帮助。
(ArcEngine+ C# TIN related 3 d function module, now of the plan is the written by a small series, each series involving some of the close contact function, and finally will be involved the content integration to a program, in order to better understand, we want to just contact this friend a little help. )