Hy,
I have a Wcf service tat receives files from clients.
The contract:
Code:
#region ServiceContract   
    [ServiceContract]   
    public interface IWcfService   
    {   
        [OperationContract(AsyncPattern = true)]   
        IAsyncResult BeginSendFile(UploadFile file, AsyncCallback callback, object state);   
        FileTransfered EndSendFile(IAsyncResult ar);
...