如何从.NET中的Active Directory获取所需的最小密码长度值

I'm implementing a plugin architecture to implement authentication an external authentication mechanism for a web site. One of the plugins I plan to provide is an ActiveDirectory plugin. I'd like to implement some of the features of a MembershipProvider, including MinRequiredPasswordLength, but don't want to fully implement or configure an ActiveDirectoryMembershipProvider.I'm implementing a plugin architecture to imple