如何在Win8 App中使用代理连接HTTPS

Question

我可以通过http连接，但无法连接https。

HttpRequestException消息：

  

发送请求时发生错误。   System.Net.WebExceptionStatus.TrustFailure

HttpClientHandler clienthandler = new HttpClientHandler();
        HttpClient client = new HttpClient(clienthandler);
        HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Post, "https://www.google.com.hk/");
        req.Headers.Referrer = new Uri("https://www.google.com.hk/");
        HttpResponseMessage mes = await client.SendAsync(req);