What is the most efficient way to send the file to .net web service?

CodeCreator

I am just wondering what would be the most efficient way to send the file (.png, .gif, .exe ) to the .net web services. In particular I need to send picture from Java mobile app to .net web service.

I can set the Content-Type to multipart/mixed from my Java mobile app to be able to send picture, but what about .net web service? How can I forcer web service get it using multipart/mixed Content-Type? It seems for me that .net web service Content-Type set in default to application/x-www-form-urlencoded and it wants me to send data as String.

Thanks a lot in advance for help