static void Main(string[] args)

        {

            const string url = "http://localhost:8270/";

            var client = new HttpClient();

            var clientId = "123456";

            var clientSecret = "abcdef";

            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(

                "Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes(clientId + ":" + clientSecret)));

            // 密码模式

            var parameters = new Dictionary<string, string>();

            parameters.Add("grant_type", "password");

            parameters.Add("UserName", "UserName");

            parameters.Add("Password", "Password");

            // 提交

            var result = client.PostAsync(url + "OAuth/Token", new FormUrlEncodedContent(parameters)).Result.Content.ReadAsStringAsync().Result;

            var entity = JsonConvert.DeserializeObject<Token>(result);

            Console.WriteLine("Token: {0}", entity.AccessToken);

            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", entity.AccessToken);

            var result2 = client.GetAsync("http://localhost:8001/api/Values").Result.Content.ReadAsStringAsync().Result;

            Console.WriteLine("Result: {0}", result2);

            Console.ReadKey();

        }