Set no cache in WCF service

protected static void SetNoCache() { OutgoingWebResponseContext response = WebOperationContext.Current.OutgoingResponse; response.Headers.Add("Cache-Control", "no-store"); response.Headers.Add("Pragma", "no-cache"); } protected static void SetCache(TimeSpan span) { OutgoingWebResponseContext response = WebOperationContext.Current.OutgoingResponse; response.Headers.Add("Expires", DateTime.Now.Add(span).ToString()); } protected static void SetCache(int expiration) { OutgoingWebResponseContext response = WebOperationContext.Current.OutgoingResponse; response.Headers.Add("Expires", DateTime.Now.AddMinutes(expiration).ToString()); }