How to get current URL in asp.net or Silverlight?

How to get current URL in asp.net or Silverlight?

Get Silverlight xap and hosting page URL

Very simple but I am often asked this during trainings:

Get the URL to the current xap file:

    App.Current.Host.Source.AbsoluteUri

Sample for Xap Name

    http://www.myhost.com/ClientBin/SilverlightApplication1.xap

Get the full URL of the page hosting the xap (with QueryStrings):

    HtmlPage.Document.DocumentUri.ToString()

Sample for hosing page URI

    http://www.myhost.com/SilverlightApplication1.aspx?param=1

Uri SourceUri = new Uri(HtmlPage.Document.DocumentUri, Application.Current.Host.Source.ToString().Substring(0,Application.Current.Host.Source.ToString().IndexOf("ClientBin") -1));

It will return http://www.myhost.com/

Thanks!