将Active Directory用户和组导入SQL Server（可能通过c＃）

I need to import all ad groups in a few OUs into a table in SQL Server 2008. Once I have those I need to import all the members of those groups to a different table. I can use c# to do the work and pass the data to SQL server or do it directly in SQL server.I need to import all ad groups in a few OUs int