Global Filters

Controllers\HomeController.cs
public class HomeController : Controller
{
public ActionResult Index()
{
throw new InvalidOperationException();
return View();
}

Views\Shared\Error.cshtml
<h2>Sorry, an error occurred while processing your request.</h2>

Global.asax.cs
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new HandleErrorAttribute());
}

protected void Application_Start()
{
RegisterGlobalFilters(GlobalFilters.Filters);
}

Web.config
<system.web>
<customErrors mode="On"/>
....

Action filters: [Authorize], [HandleError]

Custom Action Filters
public class LogAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext){}
public override void OnActionExecuted(ActionExecutedContext filterContext){}
public override void OnResultExecuting(ResultExecutingContext filterContext){}
public override void OnResultExecuted(ResultExecutedContext filterContext){}
}