Launching browser from your Phone application is often required. The common term could be “Shell” for those who came to classic VB age like me. Later in .NET it was wrapped under System.Diagnostic.Process. In Windows Phone 7 we might need such functionality while working with RSS kind of application where user can click on the link and open it in browser.
WebBrowserTask wbTask = new WebBrowserTask();
//URL = http://create.msdn.com
wbTask.Uri = new Uri(textBox1.Text, UriKind.RelativeOrAbsolute);