Question

A Silverlight 3.0 application tries to call WCF service but the application can not even establish connection to the endpoint. I had checked URLs etc. and every thing seems ok. Accessing the service from other tools like browser works. When I debug application in Visual Studio when the first call to the service is made below output is dumped:

'sllauncher.exe' (Silverlight): Loaded 'C:\Program Files\Microsoft Silverlight\4.0.50401.0\System.ServiceModel.dll'
A first chance exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll

When the above error happens, application starts to wait until timeout.

Also Silverlight application is Out of Browser one with elevated permissions set to true so no need for crossdomain.xml.

I wonder if the above System.IO.FileNotFoundException can be detailed by doing something? Or may be you may have come up with this problem.

Thanks anyway.

Answer 1

It was an issue of calling WCF service from a high level at App.xaml.cs, the problem is gone when called from MainPage.xaml.cs.