HtmlDocument.QueryString Property
Silverlight
Gets a navigable, read-only collection of name/value pairs that represent the query string parameters on the current page's URL.
Namespace: System.Windows.Browser
Assembly: System.Windows.Browser (in System.Windows.Browser.dll)
You cannot modify the query string parameters. (This is considered a page navigation action; see the Navigate overloads in the HtmlWindow class.)
If the current page URL has no query string variables, the property returns an empty collection.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.