Accessing a WCF service in a Windows Store App hangs -


i've started work on windows 8 store app needs communicate wcf service running windows service on windows 7 server. binding net.tcp, no security (yet). i've gone package.appxmanifest file , checked "internet (client)" , "private networks (client , server)" in both main application project , in unit test project. works fine in unit test project, can communicate wcf service running on windows 7 machine, i'm unable access service in windows 8 app itself. application hangs on call webservice proxy. missing simple permissions / manifest capabilities ?

edit: i've got working. service interface returned task<ilist<mydataobj>> , implementation asynchronous (used async keyword on method implementation). when ran in unit test, call getitems(), wait() on returned task. copying app, wouldn't work. when changed code in app around , awaited task call instead, call made wcf service. question @ point is, what's difference between 2 environments , cause call hang ?

i explain deadlock situation on blog , in msdn article.

the short summary await (by default) capture current context , resume async method within context.

in ui apps, context ui context, if blocking thread call wait, async method can't re-enter ui context complete.

in (most) unit testing frameworks, context thread pool context, wait blocks 1 thread pool thread , async method can continue on one.


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