private void btnInserir_Click(object sender, RoutedEventArgs e)
 {
     Models.Fabricante f = new Models.Fabricante
     {
         id        = int.Parse(txtIdFab.Text),
         descricao = txtDesc.Text
     };
     fabricantes.Add(f);
     lstFabricantes.Items.Add(f.ToString());
     cmbFabricantes.ItemsSource = fabricantes;
 }
        private async void btnInserir_Click(object sender, RoutedEventArgs e)
        {
            HttpClient httpClient = new HttpClient();

            httpClient.BaseAddress = new Uri(ip);

            Models.Fabricante f = new Models.Fabricante
            {
                Descricao = txtDesc.Text
            };

            string s       = JsonConvert.SerializeObject(f);
            var    content = new StringContent(s, Encoding.UTF8, "application/json");
            await httpClient.PostAsync("/20131011110029/api/fabricante", content);
        }