static ClientMembershipService()
 {
     ClientMembershipService.provider =
         ProviderFactory.GetProvider <IClientMembershipProvider>()
         as IClientMembershipProvider;
 }
 static ClientMembershipService()
 {
     ClientMembershipService.provider =
         ProviderFactory.GetProvider<IClientMembershipProvider>() 
         as IClientMembershipProvider;
 }