.net HttpClient 回传实体帮助类

    public class HttpClientHelper<T>
    {
        /// <summary>
        /// Get请求  返回实体
        /// </summary>
        /// <param name="url"></param>
        /// <param name="t"></param>
        /// <returns></returns>
        public static T Get(string url, T t)
        {
            HttpClient client = new HttpClient();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            var result = client.GetAsync(url).Result;
            if (result.IsSuccessStatusCode)
            {
                string re = result.Content.ReadAsStringAsync().Result;
                var jo = JObject.Parse(re);
                JSchema schema = JSchema.Parse(JsonConvert.SerializeObject(t));
                if (jo.IsValid(schema))
                {
                    var m = JsonConvert.DeserializeObject<T>(re);
                    return m;
                }
                else
                {
                    return default(T);
                }
            }
            else
            {
                return default(T);
            }
        }

        /// <summary>
        /// Get请求  返回string
        /// </summary>
        /// <param name="url"></param>
        /// <param name="t"></param>
        /// <returns></returns>
        public static string Get(string url)
        {
            HttpClient client = new HttpClient();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            var result = client.GetAsync(url).Result;
            if (result.IsSuccessStatusCode)
            {
                string re = result.Content.ReadAsStringAsync().Result;
                return re;
            }
            else
            {
                return "";
            }
        }

        /// <summary>
        /// Post请求  返回实体
        /// </summary>
        /// <param name="url"></param>
        /// <param name="t"></param>
        /// <returns></returns>
        public static T Post(string url, T t, string json = null)
        {
            var client = new HttpClient();
          
            var postContent = new StringContent(json, UTF8Encoding.UTF8, "application/json");
             var   result = client.PostAsync(url, postContent).Result;
            if (result.IsSuccessStatusCode)
            {
                string re = result.Content.ReadAsStringAsync().Result;
                var jo = JObject.Parse(re);
                JSchema schema = JSchema.Parse(JsonConvert.SerializeObject(t));
                if (jo.IsValid(schema))
                {
                    var m = JsonConvert.DeserializeObject<T>(re);
                    return m;
                }
                else
                {
                    return default(T);
                }
            }
            return default(T);
        }

        /// <summary>
        /// Post请求  返回string
        /// </summary>
        /// <param name="url"></param>
        /// <param name="t"></param>
        /// <returns></returns>
        public static string Post(string url, string json =null)
        {
            var client = new HttpClient();
            var postContent = new StringContent(json, UTF8Encoding.UTF8, "application/json");
            var result = client.PostAsync(url, postContent).Result;
            if (result.IsSuccessStatusCode)
            {
                return result.Content.ReadAsStringAsync().Result;
            }
            return null;
        }

    }