c# - StreamSocket : datareader.LoadAsync waits infinte even when data is avaialbe -

i have following code in windows phone 8 app.

//connection code, done during app start socket = new streamsocket(); await socket.connectasync(serverhostname, servicename); datareader = new datareader(socket.inputstream); datareader.inputstreamoptions = inputstreamoptions.partial; datawriter = new datawriter(socket.outputstream); 

after connection established, have thread checks incoming network packets

await datareader.loadasync(2048); datareader.readbytes(buffer); ---------- 

workflow follows

• phone connects server using socket.connectasync
• server responds initial message (phone receives in datareader.loadasync function)
• phone sends 'business specific' request
• server replies 'business specific' response (problem lies here. phone doesn't receive reply server @ of times).

there no scenario difference between working state' , 'non working state'.

so tried debug this. put breakpoint datareader.loadasync , saw execution waits infinitely @ call.

to make sure server sending data properly, ran app in windows phone emulator , ran wireshark network analyzer in pc. see packets being received ip address of phone.

anyone has hints on why datareader.loadasync function call doesn't return @ all, when there data ready read in socket?

"according documentation when using inputstreamoptions.partial, should use unconsummedbufferlength instead of hardcoded value"

that sample seems broken.

"await reader.loadasync(reader.unconsumedbufferlength);" equivalent to

await reader.loadasync(0); , it's not possible read data, since have no buffer read from.

i'm testing , seems "reader.inputstreamoptions = partial;" has no effect @ all. workaround lower read timeout.