Public Function LoginAsync( _
   ByVal credential As IdeaBlade.EntityModel.ILoginCredential, _
   Optional ByVal onSuccess As Action, _
   Optional ByVal onFail As Action(Of Exception) _
) As OperationResult

Dim instance As AuthenticationService
Dim credential As IdeaBlade.EntityModel.ILoginCredential
Dim onSuccess As Action
Dim onFail As Action(Of Exception)
Dim value As OperationResult
 
value = instance.LoginAsync(credential, onSuccess, onFail)

public OperationResult LoginAsync( 
   IdeaBlade.EntityModel.ILoginCredential credential,
   Action onSuccess,
   Action<Exception> onFail
)

public:
OperationResult^ LoginAsync( 
   IdeaBlade.EntityModel.ILoginCredential^ credential,
   Action^ onSuccess,
   Action<Exception^>^ onFail
)