[C#] Raven Controller

gistfile1.cs

using Microsoft.Practices.Unity;
using Raven.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace BeerPad.Controllers
{
    public class RavenController : Controller
    {              
        protected IDocumentStore _dstore { get; set; }
        protected IDocumentSession _session { get; set; }

        public RavenController(IDocumentStore ds) 
        {
            _dstore = ds;
        }
        
        protected override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            _session = _dstore.OpenSession();
            base.OnActionExecuting(filterContext);
        }

        protected override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            using (_session)
            {
                if (_session != null && filterContext.Exception == null)
                {
                    _session.SaveChanges();
                }
            }
            base.OnActionExecuted(filterContext);
        }
    }
}