WP7 HttpWebRequest without caching

Question

It seems that HttpWebRequest caching in WP7 is enabled by default, how do I turn it off? Adding a random param url + \"?param=\" + RND.Next(10000) works, but it\'s quite

Answer 1

In case of HttpClient (Portable for Windows Phone) "Cache-Control": "no-cache" on server side works only sometimes. And I cannot add query string random value to RESTful api call as well.

Solution from @frno works good and looks like for HttpClient:

client.DefaultRequestHeaders.IfModifiedSince = DateTime.UtcNow;

Thank you.