Json Extensions class to allow deserialisation of JSON directly from a stream. Adapted from http://stackify.com/improved-performance-using-json-streaming

JsonExtensions.cs

public static class JsonExtensions
{
    public static T Deserialise<T>(this Stream jsonStream)
        where T : class
    {
        if (jsonStream == null)
        {
            throw new ArgumentNullException(nameof(jsonStream));
        }

        if (!jsonStream.CanRead)
        {
            throw new ArgumentException("JSON stream must support reading", nameof(jsonStream));
        }

        using (var streamReader = new StreamReader(jsonStream))
        using (var jsonReader = new JsonTextReader(streamReader))
        {
            var serialiser = new JsonSerializer();
            return serialiser.Deserialize<T>(jsonReader);
        }
    }
}

Pretty much the same code as the original but changed for my own personal style. Oh and I'm British so z=>s!