title: C# - visit url in background
body: <p>having a brain freeze today.</p>
  
  <p>I'm looking to visit a URL to add tracking information just before my shopping cart gets redirected back to the main page (i.e. just after purchase).</p>
  
  <p>I can't think how I could visit that URL without actually redirecting to my tracking page, and then redirecting again from there back to the homepage.  Does anyone know?</p>
  
  <p>This seems like it should be really easy, but I can't seem to get it working.</p>
  
  <p>Thanks</p>