title: Closing a Window in WPF (When not in that Window)
body: <p>I have an application which starts with a simple start screen allowing the user to select either New or Open a project.  When selecting New I have a new window displayed which is a wizard that collects data to be passed to the Main window.</p>
  
  <p>I create a new Window for the Main window and show that.
  Then I close the wizard easily enough with <code>this.close();</code>
  But how do I close the initial window which is the Startup URI window?</p>