title: How Do I Post and then redirect to an external URL from ASP.Net?
body: <p>ASP.NET server-side controls postback to their own page.  This makes cases where you want to redirect a user to an external page, but need to post to that page for some reason (for authentication, for instance) a pain.</p>
  
  <p>An <code>HttpWebRequest</code> works great if you don't want to redirect, and JavaScript is fine in some cases, but can get tricky if you really do need the server-side code to get the data together for the post.</p>
  
  <p>So how do you both post to an external URL and redirect the user to the result from your ASP.NET codebehind code?</p>