I am very new to programming and I am going through this demo, building it from scratch from your video using Visual Web Developer 2020 Express. I am running Silverlight 4 on Windows XP. I get to the end of building the server WCF service, press <F5> to
run the project. All is well until I try to access the Meta Data by typing the ChatService.svc URL on my localhost. Then I get the error message
"Configuration binding extension 'system.serviceModel/bindings/pollingDuplex' could not be found. Verify that this binding extension is properly registered in system.serviceModel/extensions/bindingExtensions and that it is spelled correctly."
I gathered from other posts on your blogsite that this is a common problem. I have de-installed and re-installed silverlight to no avail. Any thoughts? What am I doing wrong?