public class TaskRegistry : StructureMap.Configuration.DSL.Registry
{
        public TaskRegistry()
        {
            Scan(scan =>
            {
                scan.Assembliy("yourAssemblyName");
                scan.AddAllTypesOf<IRunAtInit>();
                scan.AddAllTypesOf<IRunAtStartUp>();
                scan.AddAllTypesOf<IRunOnEachRequest>();
                scan.AddAllTypesOf<IRunOnError>();
                scan.AddAllTypesOf<IRunAfterEachRequest>();
            });
        }
}

ioc.AddRegistry(new TaskRegistry());

protected void Application_Start()
{
   // other code
   foreach (var task in SmObjectFactory.Container.GetAllInstances<IRunAtInit>())
   {
                task.Execute();
    }
}
protected void Application_BeginRequest()
 {
           foreach (var task in SmObjectFactory.Container.GetAllInstances<IRunOnEachRequest>())
           {
                task.Execute();
           }
}
protected void Application_EndRequest(object sender, EventArgs e)
{
            try
            {
                foreach (var task in SmObjectFactory.Container.GetAllInstances<IRunAfterEachRequest>())
                {
                    task.Execute();
                }
            }
            finally
            {
                HttpContextLifecycle.DisposeAndClearAll();
                MiniProfiler.Stop();
            }
}
protected void Application_Error()
{
            foreach (var task in SmObjectFactory.Container.GetAllInstances<IRunOnError>())
            {
                task.Execute();
            }
}

public class TransactionPerRequest : IRunOnEachRequest, IRunOnError, IRunAfterEachRequest
{
        private readonly IUnitOfWork _uow;
        private readonly HttpContextBase _httpContext;
        public TransactionPerRequest(IUnitOfWork uow, HttpContextBase httpContext)
        {
            _uow = uow;
            _httpContext = httpContext;
        }


        void IRunOnEachRequest.Execute()
        {
            _httpContext.Items["_Transaction"] =
                _uow.Database.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
        }

        void IRunOnError.Execute()
        {
            _httpContext.Items["_Error"] = true;
        }

        void IRunAfterEachRequest.Execute()
        {
            var transaction = (DbContextTransaction) _httpContext.Items["_Transaction"];
            if (_httpContext.Items["_Error"] != null)
            {
                transaction.Rollback();
            }
            else
            {
                transaction.Commit();
            }
        }
}

_categoryService.AddNewCategory(category);
_uow.SaveAllChanges();

throw new InvalidOperationException();

return RedirectToAction("Index");