title: Redirect to external URL with custom schema
body: <p>I have Asp.net MVC4 project. I want to make redirect to the external url if specified action is called. 
  Url should have custom schema, for example not <code>http://</code> but <code>myschema://</code>.</p>
  
  <p>I know that to redirect to google.com I can use <code>return Redirect("http://google.com")</code>, but this doesn't work if I call <code>return Redirect("myschema://someaddress.com")</code></p>
  
  <p>I need this custom schema to start app on IOS device and I need to do redirection in MVC project because I want to send link to email, this link will lead to action on my site and this action will do redirect to custom schema.</p>
  
  <p>Sending link with custom schema directly in mail is not working because mail servers delete this link from the mail.
  Also I don't want to redirect user to the frontend where he will need to click to the link with custom schema.</p>
  
  <p>Is it possible or should I do it in other way?</p>