public void TestRestSP2013(string accessToken)
        {
            HttpWebRequest endpointRequest = (HttpWebRequest)HttpWebRequest.Create(
             "http://<site url>/_vti_bin/client.svc/web/lists/getbytitle('TestList')/Items");
            endpointRequest.Method = "GET";
            endpointRequest.Accept = "application/json;odata=verbose";
            endpointRequest.Headers.Add("Authorization", "Bearer " + accessToken);

            HttpWebResponse endpointResponse = (HttpWebResponse)endpointRequest.GetResponse();
        }

public void Aut1()
        {
            const string format0 = @"{0}{1}";
            const string format1 = @"{0}:{1}";
            string userName = string.Format(format0, domain, user);
            string userandpassword = Convert.ToBase64String(Encoding.Default.GetBytes(string.Format(format1, userName, password)));

            HttpClient _Client = new System.Net.Http.HttpClient();
            _Client.DefaultRequestHeaders.Accept.Clear();
            _Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            _Client.BaseAddress = new Uri(apiBaseUri);
            _Client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", userandpassword);
            // _Client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", userandpassword);
            var res = _Client.GetAsync("/_api/lists");//.ConfigureAwait(false);
            var test = res.Result;
            outPut = test.ToString();
        }

public string GetDigets()
        {
            String retVal = "";
            try
            {
                string url = apiBaseUri;
                HttpClient client = new HttpClient(new HttpClientHandler() { Credentials = new NetworkCredential(user, password, domain) });
                client.BaseAddress = new System.Uri(url);
                string cmd = "_api/contextinfo";
                client.DefaultRequestHeaders.Add("Accept", "application/json;odata=verbose");
                client.DefaultRequestHeaders.Add("ContentType", "application/json");
                client.DefaultRequestHeaders.Add("ContentLength", "0");
                StringContent httpContent = new StringContent("");
                var response = client.PostAsync(cmd, httpContent).Result;
                if (response.IsSuccessStatusCode)
                {
                    string content = response.Content.ReadAsStringAsync().Result;

                    JObject v = JObject.Parse(content);
                    //dynamic val = JValue.Parse(content);
                    var d = v.SelectToken("d");

                    //JObject val = JValue.Parse(content).ToObject()

                    JObject wi = d.SelectToken("GetContextWebInformation") as JObject;
                    retVal = wi.GetValue("FormDigestValue").ToString();
                }
            }
            catch
            { }
            return retVal;
        }

public async Task GetItems()
            {
                 _token = GetDigets();
                string digest = _token;
                string tempVal = "Error ";
                try
                {
                    string url = apiBaseUri;
                    HttpClient client = new HttpClient(new HttpClientHandler()
                    {
                        Credentials = new NetworkCredential(user, password, domain)
                    });
                    client.BaseAddress = new System.Uri(url);
                    client.DefaultRequestHeaders.Clear();
                    client.DefaultRequestHeaders.Add("Accept", "application/json;odata=verbose");
                    client.DefaultRequestHeaders.Add("ContentType", "application/json;odata=verbose");
                    client.DefaultRequestHeaders.Add("X-RequestDigest", digest);
                    client.DefaultRequestHeaders.Add("X-HTTP-Method", "POST");
                    StringContent strContent = new StringContent("");
                    HttpResponseMessage response = new HttpResponseMessage();

                response = await client.PostAsync("_api/web/lists/getbytitle('test')/GetItems(query=@v1)?@v1={'ViewXml':''}", strContent);
               // response = await client.PostAsync("_api/lists/getbytitle('Pharmakonlist')/items", strContent); This dont work

                response.EnsureSuccessStatusCode();
                if (response.IsSuccessStatusCode)
                {
                    var content = response.Content.ReadAsStringAsync();
                    string test = content.Result.ToString(); // This is XML
                   // var d = JObject.Parse(content.Result);
                    //JObject results = d.SelectTokens("d");
                   // string content = response.Content.ReadAsStringAsync().Result;
                    // JObject val = JToken.Parse(content).ToObject();
                    //JObject d = val.GetValue("d");
                }
            }
            catch (Exception ex)
            { string Tempmessage = ex.Message; }
            outPut = tempVal;
            // return tempVal;
        }

private static async Task<string> GetAPIToken(string userName, string password, string apiBaseUri)
            {
                using (var client = new HttpClient())
                {
                    //setup client
                    client.BaseAddress = new Uri(apiBaseUri);
                    client.DefaultRequestHeaders.Accept.Clear();
                    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                    //setup login data
                    var formContent = new FormUrlEncodedContent(new[]
                    {
                        new KeyValuePair<string, string>("grant_type", "password"),
                        new KeyValuePair<string, string>("username", userName),
                        new KeyValuePair<string, string>("password", password),
                    });
                    //send request
                    HttpResponseMessage responseMessage = await client.PostAsync("/Token", formContent);

                    //get access token from response body
                    var responseJson = await responseMessage.Content.ReadAsStringAsync();
                    var jObject = JObject.Parse(responseJson);
                    return jObject.GetValue("access_token").ToString();
                }
            }