When your network use a proxy server for your LAN, you got the error for running the web application as below.
Error : The Remote server returned an error :(407) Proxy Authentication Required.
At that time, go Tools Menu> Internet Options> Connections Tab> LAN Settings and see Proxy Server information as below.
Add the following section to web.config.
<system.net>
<defaultProxy enabled="true" useDefaultCredentials="true">
<proxy bypassonlocal="True" proxyaddress="http://webproxy:80/>
</defaultProxy>
</system.net>
That's it. How's easy!
