json参数不能格式化，要写在一起（不能有空格、换行符等）

你好 Authorization 这个请求头如何设置成WECHATPAY2-SHA256-RSA2048呢？ 我的直接报错：  "Http头Authorization值格式错误，请参考《微信支付商户REST API签名规则》"

dynamic param = new {  "mchid": "1900006XXX",  "out_trade_no": "1217752501201407033233368318",  "appid": "wxdace645e0bc2cXXX",  "description": "Image形象店-深圳腾大-QQ公仔",  "notify_url": "https://www.weixin.qq.com/wxpay/pay.php",  "amount": {   "total": 1,   "currency": "CNY"  },  "payer": {   "openid": "o4GgauInH_RCEdvrrNGrntXDuXXX"  } }; string method = "POST", uri = "/v3/pay/transactions/jsapi", _timeStamp = getTimeStamp(),_nonce_str = get_nonce_str(),body = JsonHelper.SerializeObject(param); string message = $"{method}\n{uri}\n{_timeStamp}\n{_nonce_str}\n{body}\n"; // 使用RSA进行签名 string  _signature = ComputeSha256Hash(message, _mch_private_key); string authrizationValue = $"mchid=\"{_mch_id}\",nonce_str=\"{_nonce_str}\",timestamp=\"{_timeStamp}\",serial_no=\"{_serial_no}\",signature=\"{_signature}\""; HttpRequestMessage httpRequest = new HttpRequestMessage(HttpMethod.Post, jsapi_v3_Url);                 httpRequest.Content = new StringContent(body, Encoding.UTF8, "application/json");                 httpRequest.Headers.Add("Accept", "application/json");                 httpRequest.Headers.Add("ContentType", "application/json");                 httpRequest.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("WECHATPAY2-SHA256-RSA2048", authrizationValue); using (HttpClient httpClient = new HttpClient()) {       HttpResponseMessage response = await httpClient.SendAsync(httpRequest);  //这里就一直没反应，也不报错 $$_$$!             string responseString = await response.Content.ReadAsStringAsync(); }