gistfile1.cs

public class JsonValueSampleConfiguration : HostConfiguration
{
  public override void RegisterRequestProcessorsForOperation( HttpOperationDescription operation, IList<Processor> processors, MediaTypeProcessorMode mode)
    {
        processors.Add(new FormUrlEncodedProcessor(operation, mode));
    }

  public override void RegisterResponseProcessorsForOperation( HttpOperationDescription operation, IList<Processor> processors, MediaTypeProcessorMode mode)
    {
        processors.ClearMediaTypeProcessors();
        processors.Add(new JsonProcessor(operation, mode));
    }
}