How do you disable caching with WebClient and Windows Phone 7

Question

I am making a call to a REST web service and the mobile app is retrieving the results from its cache and not going to the server.

I have seen other suggested fixes (

Answer 1

WebClient wc = new WebClient();
wc.Headers[HttpRequestHeader.IfModifiedSince] = DateTime.UtcNow.ToString();

worked for me