Howto: (Almost) Everything In Active Directory via C#

C# 对域DC的操作，参考了：

Howto: (Almost) Everything In Active Directory via C#:

http://www.codeproject.com/KB/system/everythingInAD.aspx#13

http://www.willasrari.com/blog/query-active-directory-users-using-c/000133.aspx