System.Net.Http.HttpContent' does not contain a definition for 'ContentReadStream

I  am making a wpf application where i have to consume WebAPI using HttpClient, This is my code.

 HttpClient client = new HttpClient();

            client.BaseAddress = new Uri("http://localhost:12789/");

            //client.DefaultRequestHeaders.Add("appkey", "myapp_key");

            // Add an Accept header for JSON format.

            client.DefaultRequestHeaders.Accept.Add(

                new MediaTypeWithQualityHeaderValue("application/json"));

            HttpResponseMessage response = client.GetAsync("api/employee").Result;

            if (response.IsSuccessStatusCode)

            {

                var employees = response.Content.ReadAsAsync<IEnumerable<Employee>>().Result;

                grdEmployee.ItemsSource = employees;

            }

            else

            {

                MessageBox.Show("Error Code" + response.StatusCode + " : Message - " + response.ReasonPhrase);

            }

But i am getting this error.

"'System.Net.Http.HttpContent' does not contain a definition for

'ReadAsAsync' and no extension method 'ReadAsAsync' accepting a

first argument of type 'System.Net.Http.HttpContent' could be

found (are you missing a using directive or an assembly reference?)"

Solution:

After little googling i found the solution.

Add a reference to System.Net.Http.Formatting.dll. This assembly is also available in the C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies folder.

The method ReadAsAsync is an extension method declared in the class HttpContentExtensions, which is in the namespace System.Net.Http in the library System.Net.Http.Formatting.