C# Sort JSON string keys using System.Json (see http://stackoverflow.com/questions/14417235/c-sharp-sort-json-string-keys )

JsonHelper.cs

//
//  JsonHelper.cs
//
//  Created by Eduardo Coelho <dev@educoelho.com>
//
using System;
using System.Json;
using System.Linq;

using NUnit.Framework; // Tests

namespace JsonHelperSample
{
  public class JsonHelper
	{
		#region Sort
		
		public static string Sort (string jsonString)
		{
			if (jsonString != null) {
				var jObj = (JsonObject)JsonValue.Parse (jsonString);
				Sort (jObj);
				return jObj.ToString ();
			}
			
			return null;
		}
		
		#endregion
		
		#region Private
		
		static void Sort (JsonObject jObj)
		{
			var props = jObj.ToList ();
			foreach (var prop in props) {
				jObj.Remove (prop.Key);
			}
			
			foreach (var prop in props.OrderByDescending(p => p.Key)) {
				jObj.Add (prop);
				if (prop.Value is JsonObject)
					Sort ((JsonObject)prop.Value);
			}
		}
		
		#endregion
	}


	[TestFixture]
	public class JsonHelperSortTests
	{
		[Test]
		public void TestSortNull ()
		{
			string sourceString = null;
			string sortedString = JsonHelper.Sort (sourceString);
			Assert.Null (sortedString);
		}
		
		[Test]
		public void TestSortEmptyJSONObject ()
		{
			string sourceString = "{}";
			string sortedString = JsonHelper.Sort (sourceString);
			Assert.AreEqual (sourceString, sortedString);
		}
		
		[Test]
		public void TestSortNestedJSONObjects ()
		{
			string sourceString = "{\"birthday\": \"1988-03-18\", \"address\": {\"state\": 24, \"city\": 8341, \"country\": 1 }}";
			string sortedString = JsonHelper.Sort (sourceString);
			string expectedString = "{\"address\": {\"city\": 8341, \"country\": 1, \"state\": 24}, \"birthday\": \"1988-03-18\"}";

			Assert.AreEqual (expectedString, sortedString);
		}
	}
}

	public void TestSortNestedJSONObjects ()
	{
		string sourceString = "{\"birthday\": \"1988-03-18\",""}";
			Assert.AreEqual (expectedString, sortedString);
	}

Thanks a lot man!