title: How to manually set upstream proxy for fiddler core?
body: <p>I'd like to be able to redirect http requests from fiddler code through upstream proxys, which I want to be able to specify at runtime.</p>
  
  <p>I've looked through <code>FiddlerApplication</code> functions, and I don't see anything that might fit, as well as I haven't found anything matching in the documentation (except that you might specify a startup flag to use system's proxy as upstream proxy).</p>
  
  <p>What is the best way to specify/change fiddler core proxy at runtime?</p>