Xamarin.android xamarin android从webservice接收一个简单的句子/字符串

我试图从一个Web服务接收一个简单的句子，但我有点不对劲

这是我要从Web服务请求的异步任务：

private async Task<string> GetData (string url)
    {
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create (new Uri(url));
        request.ContentType = "text/plain";
        request.Method = "GET";

        using (WebResponse response = await request.GetResponseAsync())
        {
            using (Stream stream = response.GetResponseStream())
            {
                string doc = await Task.Run(() => stream.ToString());
                return doc;
            }
        }

    }

我的文本视图中只有“System.Net.WebConnectionStream”，不知道应该使用哪个函数。或者也许一切都错了

也许有人有主意

公共静态异步任务SendGetRequestAsync（字符串url）{
public static async Task<string> SendGetRequestAsync (string url) {

            string responseString = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create (url);
            request.Method = WebRequestMethods.Http.Get;
            HttpWebResponse response;

            await Task.Run (() => {
                try {
                    response = request.GetResponse () as HttpWebResponse;
                    using (var reader = new StreamReader (response.GetResponseStream ())) {
                        responseString = reader.ReadToEnd ();
                    }
                } catch (WebException ex) {

                    Console.WriteLine (ex);
                }
            });

            return responseString;
        }

字符串responseString=“”；
HttpWebRequest请求=（HttpWebRequest）WebRequest.Create（url）；
request.Method=WebRequestMethods.Http.Get；
HttpWebResponse；
等待任务。运行（（）=>{
试一试{
response=request.GetResponse（）作为HttpWebResponse；
使用（var reader=newstreamreader（response.GetResponseStream（）））{
responseString=reader.ReadToEnd（）；
}
}捕获（WebException ex）{
Console.WriteLine（ex）；
}
});
回报率；
}

public static async Task<string> SendGetRequestAsync (string url) {

            string responseString = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create (url);
            request.Method = WebRequestMethods.Http.Get;
            HttpWebResponse response;

            await Task.Run (() => {
                try {
                    response = request.GetResponse () as HttpWebResponse;
                    using (var reader = new StreamReader (response.GetResponseStream ())) {
                        responseString = reader.ReadToEnd ();
                    }
                } catch (WebException ex) {

                    Console.WriteLine (ex);
                }
            });

            return responseString;
        }