IWebProxyScript.Run Method
Runs a script.
Assembly: System (in System.dll)
When the HttpWebRequest object is run, it may need to run the WPAD (Web Proxy Automatic Detection) protocol to detect whether a proxy is required for reaching the destination URL. During this process, the system downloads and compiles the PAC (Proxy Auto-Configuration) script in memory and tries to execute the FindProxyForURL function as per the PAC specification.
When doing so, the system creates an internal application domain inside the application which runs with mimimal permissions and most importantly, it does not grant the UI permission to this new application domain. The evaluation of a proxy and running the FindProxyForURL javascript function happens in the context of this new application domain and during this process the system may need to run several helper functions as per the PAC specification.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.