<ExtensionAttribute()>
Public Shared Function CreateAsync(Of T As Class)( _
   ByVal source As IFactory(Of T), _
   ByVal onSuccess As Action(Of T), _
   ByVal onFail As Action(Of Exception) _
) As OperationResult(Of T)

Dim source As IFactory(Of T)
Dim onSuccess As Action(Of T)
Dim onFail As Action(Of Exception)
Dim value As OperationResult(Of T)
 
value = Compatibility.CreateAsync(Of T)(source, onSuccess, onFail)

[ExtensionAttribute()]
public static OperationResult<T> CreateAsync<T>( 
   IFactory<T> source,
   Action<T> onSuccess,
   Action<Exception> onFail
)
where T: class

[ExtensionAttribute()]
public:
static OperationResult<T^>^ CreateAsyncgeneric<typename T>
( 
   IFactory<T^>^ source,
   Action<T^>^ onSuccess,
   Action<Exception^>^ onFail
) 
where T: ref class