JSON.net Formatter for ASP.NET MVC WEB-API

JsonNetFormatter.cs

using System;
using System.IO;
using System.Net;
using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace Global.Serialization
{
	public class JsonNetFormatter : MediaTypeFormatter
	{
		private JsonSerializerSettings _jsonSerializerSettings;

		public JsonNetFormatter(JsonSerializerSettings jsonSerializerSettings)
		{
			_jsonSerializerSettings = jsonSerializerSettings ?? new JsonSerializerSettings();

			// Fill out the mediatype and encoding we support
			SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/json"));
			Encoding = new UTF8Encoding(false, true);
		}

		protected override bool CanReadType(Type type)
		{
			if (type == typeof(IKeyValueModel))
			{
				return false;
			}

			return true;
		}

		protected override bool CanWriteType(Type type)
		{
			return true;
		}

		protected override Task<object> OnReadFromStreamAsync(Type type, Stream stream, HttpContentHeaders contentHeaders, FormatterContext formatterContext)
		{
			// Create a serializer
			JsonSerializer serializer = JsonSerializer.Create(_jsonSerializerSettings);

			// Create task reading the content
			return Task.Factory.StartNew(() =>
			{
				using (StreamReader streamReader = new StreamReader(stream, Encoding))
				{
					using (JsonTextReader jsonTextReader = new JsonTextReader(streamReader))
					{
						return serializer.Deserialize(jsonTextReader, type);
					}
				}
			});
		}

		protected override Task OnWriteToStreamAsync(Type type, object value, Stream stream, HttpContentHeaders contentHeaders, FormatterContext formatterContext, TransportContext transportContext)
		{
			// Create a serializer
			JsonSerializer serializer = JsonSerializer.Create(_jsonSerializerSettings);

			// Create task writing the serialized content
			return Task.Factory.StartNew(() =>
			{
				using (JsonTextWriter jsonTextWriter = new JsonTextWriter(new StreamWriter(stream, Encoding)) { CloseOutput = false })
				{
					serializer.Serialize(jsonTextWriter, value);
					jsonTextWriter.Flush();
				}
			});
		}
	}
}

Encoding is undefined - line 22.
IKeyValueModel is undefined - line 27.

This is SOOOO much easier:

	private async Task<T> CallWebApiAsync<T>(string url, string api, object parameters) {
		try {
			HttpClient client = new HttpClient();
			client.BaseAddress = new Uri(url);
			client.DefaultRequestHeaders.Accept.Clear();
			client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));


			HttpResponseMessage response = await client.PostAsJsonAsync(api, parameters);
			if(!response.IsSuccessStatusCode)
				throw new Exception("Error " + response.StatusCode + ": " + response.ReasonPhrase);

			string sResponse = await response.Content.ReadAsStringAsync();
			T ret = Newtonsoft.Json.JsonConvert.DeserializeObject<T>(sResponse);
			return ret;
		}
		catch(Exception ex) {
			throw ex;
		}
	}