Sitecore ID Model Binder

IDBinder.cs

using Sitecore.Data;
using System.Web.Mvc;

namespace MikeRobbins.SitecoreUtilities.ModelBinders
{
    public class IDBinder : DefaultModelBinder
    {
        public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
        {
            ID id = ID.Null;

            string key = bindingContext.ModelName;
            ValueProviderResult val = bindingContext.ValueProvider.GetValue(key);

            if (val != null)
            {
                var s = val.AttemptedValue;
                if (!string.IsNullOrEmpty(s))
                {
                     ID.TryParse(s, out id);
                }
            }

            return id;
        }
    }
}

Initializer.cs

public class Initializer
{
  public static void Initialize()
  {
    ModelBinders.Binders.Add(typeof(ID), new IDBinder());
  }
}

UnitTest.cs

using System.Collections.Specialized;
using System.Web.Mvc;
using MikeRobbins.SitecoreUtilities.ModelBinders;
using NUnit.Framework;
using Sitecore.Data;

namespace MikeRobbins.Tests
{
    [TestFixture]
    public class ModelBinderTests
    {
        [Test]
        public void ValidIDModelBinder()
        {
            var formCollection = new NameValueCollection {
                { "ID", "BD499F66-8BEE-4910-BC30-47783EF80FA3" }
            };

            var valueProvider = new NameValueCollectionValueProvider(formCollection, null);
            var modelMetadata = ModelMetadataProviders.Current.GetMetadataForType(null, typeof(ID));

            var bindingContext = new ModelBindingContext
            {
                ModelName = "ID",
                ValueProvider = valueProvider,
                ModelMetadata = modelMetadata
            };

            IDBinder b = new IDBinder();
            ControllerContext controllerContext = new ControllerContext();

            // Act
            ID result = (ID)b.BindModel(controllerContext, bindingContext);

            ID expected = new ID("BD499F66-8BEE-4910-BC30-47783EF80FA3");

            Assert.AreEqual(result,expected);
        }

    }
}