调用HttpClient.PostAsync时传token等值

做内部接口转发时加token验证需要传token值过去，有如下两种方式

string jsonContent = JsonConvert.SerializeObject(args);
using(var clientUrl = new HttpClient())
{
    var token = "token的值";
    // 法①
    clientUrl.DefaultRequestHeaders.Add("token", token);
    var data = new StringContent(jsonContent, Encoding.UTF8, "application/json");
    result = clientUrl.PostAsync(url, data).Result.Content.ReadAsStringAsync().Result;
  
    // 法②
    var data = new StringContent(jsonContent, Encoding.UTF8, "application/json");
    data.Headers.Add("token", token);
    result = clientUrl.PostAsync(url, data).Result.Content.ReadAsStringAsync().Result;
}

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