Well, I am still confused. This is the kinda of the object I would like to send over from iOS to WCF eventually. ObjectToSend{ string firstname; string lastname; int ID; string Notes Stream Image; Stream AudioFile; Stream textfile; etc... } - Will I able able to send an object like this where it does have Stream datatype members? Right now, I am able to send JSON objects like this one because its easy to represent it as JSON ObjectToSend{ string firstname; string lastname; int ID; string Notes } And I can upload image using stream mode as void uploadImage(Stream image). I am just not quite sure if and how I can have the Stream as member of an object, when WCF allows only Single Stream input/output parameter. I feel like there is a way, I just can't wrap my head around it.