<ExtensionAttribute()>
Public Overloads Shared Function OnComplete(Of T)( _
   ByVal source As IdeaBlade.EntityModel.EntityQueryOperation(Of T), _
   ByVal onSuccess As Action(Of IEnumerable(Of T)), _
   ByVal onFail As Action(Of Exception) _
) As IdeaBlade.EntityModel.EntityQueryOperation(Of T)

Dim source As IdeaBlade.EntityModel.EntityQueryOperation(Of T)
Dim onSuccess As Action(Of IEnumerable(Of T))
Dim onFail As Action(Of Exception)
Dim value As IdeaBlade.EntityModel.EntityQueryOperation(Of T)
 
value = OperationFns.OnComplete(Of T)(source, onSuccess, onFail)

[ExtensionAttribute()]
public static IdeaBlade.EntityModel.EntityQueryOperation<T> OnComplete<T>( 
   IdeaBlade.EntityModel.EntityQueryOperation<T> source,
   Action<IEnumerable<T>> onSuccess,
   Action<Exception> onFail
)

[ExtensionAttribute()]
public:
static IdeaBlade.EntityModel.EntityQueryOperation<T^>^ OnCompletegeneric<typename T>
( 
   IdeaBlade.EntityModel.EntityQueryOperation<T^>^ source,
   Action<IEnumerable<T^>^>^ onSuccess,
   Action<Exception^>^ onFail
) 

public OperationResult GetCustomers(Action<IEnumerable<Customer>> onSuccess = null,
                Action<Exception> onFail = null)
                {
                var op = Manager.Customers.ExecuteAsync();
                return op.OnComplete(onSuccess, onFail).AsOperationResult();
                }