C# http Web请求提供500服务器错误？

所以我尝试使用这段代码将数据发送到API以创建一个新帐户，但它崩溃了，并给出了一个500服务器错误

var Account= new Account();
Account.name = "Test Name";

//Serialize
string json = JsonConvert.SerializeObject(Account);


WebRequest request = WebRequest.Create("https://api.example.com/profiles/1");
request.ContentType = "text/json";
request.Method = "POST";

    using (streamWriter = new StreamWriter(httpRequest.GetRequestStream()))
            {
                streamWriter.Write(json);
            }

            using (httpWebResponse = httpRequest.GetResponse() as HttpWebResponse)
            {
                streamReader = new StreamReader(httpWebResponse.GetResponseStream());
                var jsonResponse = streamReader.ReadToEnd();
            }

然后我尝试了msdn网站的例子：

             // Create a request using a URL that can receive a post. 
        WebRequest request = WebRequest.Create ("https://api.example.com/profiles/1");
        // Set the Method property of the request to POST.
        request.Method = "POST";
        // Create POST data and convert it to a byte array.

        byte[] byteArray = Encoding.UTF8.GetBytes (json);
        // Set the ContentType property of the WebRequest.
        request.ContentType = "application/json";
        // Set the ContentLength property of the WebRequest.
        request.ContentLength = byteArray.Length;
        // Get the request stream.
        Stream dataStream = request.GetRequestStream ();
        // Write the data to the request stream.
        dataStream.Write (byteArray, 0, byteArray.Length);
        // Close the Stream object.
        dataStream.Close ();
        // Get the response.
        WebResponse response = request.GetResponse ();
        // Display the status.
        Console.WriteLine (((HttpWebResponse)response).StatusDescription);
        // Get the stream containing content returned by the server.
        dataStream = response.GetResponseStream ();
        // Open the stream using a StreamReader for easy access.
        StreamReader reader = new StreamReader (dataStream);
        // Read the content.
        string responseFromServer = reader.ReadToEnd ();
        // Display the content.
        Console.WriteLine (responseFromServer);
        // Clean up the streams.
        reader.Close ();
        dataStream.Close ();
        response.Close ();

来自msdn的代码给出了相同的错误

然后我尝试了RESTEasy插件并将数据发布到api中，该插件运行良好，没有给出任何错误，并创建了帐户

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这有什么问题吗？我是做错了还是错过了什么？另外，第一个代码在使用方法补丁时运行良好首先，您的Url应该包含以下方案：http或其他任何内容……使用fiddler或wireshark跟踪请求并确保其匹配。