System.Object
   System.Configuration.Provider.ProviderBase
      System.Configuration.SettingsProvider
         System.Web.Profile.ProfileProvider
            VistaDB.Web.VistaDBProfileProvider
      System.Web.Security.MembershipProvider
         VistaDB.Web.VistaDBMembershipProvider
      System.Web.Security.RoleProvider
         VistaDB.Web.VistaDBRoleProvider

Reference

VistaDB.6.Web Assembly