nhibernate入门系列: many-to-many映射

public class User {

   public User() {
   }

   public int UserId
   {
      get { return userId; }
      set { userId = value; }
   }

   public int Name
   {
      get { return name; }
      set { name = value; }
   }

   public IDictionary Groups
   {
      get { return groups; }
      set { groups = value; }
   }

   private int userId;
   private string name;
   private IDictionary groups = new Hashtable();

} //class User