JsonNetResult.cs

using System;
using System.Web.Mvc;
using Newtonsoft.Json;

public class JsonNetResult : JsonResult {
	public JsonSerializerSettings SerializerSettings { get; set; }
	public Formatting Formatting { get; set; }

	public JsonNetResult(object data) {
		this.JsonRequestBehavior = JsonRequestBehavior.DenyGet;
		this.SerializerSettings = new JsonSerializerSettings();
		this.Data = data;
	}

	public JsonNetResult(object data, Formatting formatting) : this(data) {
		this.Formatting = formatting;
	}

	public override void ExecuteResult(ControllerContext context) {
		if (context == null)
			throw new ArgumentNullException(nameof(context));
		if (this.JsonRequestBehavior == JsonRequestBehavior.DenyGet && string.Equals(context.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase))
			throw new InvalidOperationException("Get not allowed.");

		var response = context.HttpContext.Response;
		response.ContentType = string.IsNullOrEmpty(this.ContentType) ? "application/json" : this.ContentType;
		if (this.ContentEncoding != null)
			response.ContentEncoding = this.ContentEncoding;
		if (this.Data == null)
			return;

		using (var jsonWriter = new JsonTextWriter(response.Output) { Formatting = Formatting }) {
			var jsonSerializer = JsonSerializer.Create(SerializerSettings);
			jsonSerializer.Serialize(jsonWriter, Data);
		}
	}
}