Add the actual filters interface signatures,

Add the AuthorizationFilterAttribute

samples/MvcSample/FiltersController.cs

@@ -1,4 +1,6 @@
-using Microsoft.AspNet.Mvc;
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNet.Mvc;
 using MvcSample.Models;
 
 namespace MvcSample
@@ -7,6 +9,8 @@ namespace MvcSample
     // TODO: Add a real filter here
     [ServiceFilter(typeof(object), Order = 1)]
     [ServiceFilter(typeof(string))]
+    [PassThrough(Order = 0)]
+    [PassThrough(Order = 2)]
     public class FiltersController : Controller
     {
         private readonly User _user = new User() { Name = "User Name", Address = "Home Address" };
@@ -18,4 +22,12 @@ namespace MvcSample
             return View("MyView", _user);
         }
     }
-}
+
+    public class PassThroughAttribute : AuthorizationFilterAttribute
+    {
+        public async override Task Invoke(AuthorizationFilterContext context, Func<AuthorizationFilterContext, Task> next)
+        {
+            await next(context);
+        }
+    }
+}

src/Microsoft.AspNet.Mvc.Core/Filters/AuthorizationFilterAttribute.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Threading.Tasks;
+
+namespace Microsoft.AspNet.Mvc
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
+    public abstract class AuthorizationFilterAttribute : Attribute, IFilter, IAuthorizationFilter
+    {
+        public abstract Task Invoke(AuthorizationFilterContext context, Func<AuthorizationFilterContext, Task> next);
+
+        public int Order { get; set; }
+    }
+}

src/Microsoft.AspNet.Mvc.Core/Filters/IActionFilter.cs

@@ -0,0 +1,8 @@
+using Microsoft.AspNet.Mvc.Filters;
+
+namespace Microsoft.AspNet.Mvc
+{
+    public interface IActionFilter : IFilter<ActionFilterContext>
+    {
+    }
+}

src/Microsoft.AspNet.Mvc.Core/Filters/IActionResultFilter.cs

@@ -0,0 +1,8 @@
+using Microsoft.AspNet.Mvc.Filters;
+
+namespace Microsoft.AspNet.Mvc
+{
+    public interface IActionResultFilter : IFilter<ActionResultFilterContext>
+    {
+    }
+}

src/Microsoft.AspNet.Mvc.Core/Filters/IAuthorizationFilter.cs

@@ -0,0 +1,8 @@
+using Microsoft.AspNet.Mvc.Filters;
+
+namespace Microsoft.AspNet.Mvc
+{
+    public interface IAuthorizationFilter : IFilter<AuthorizationFilterContext>
+    {
+    }
+}

src/Microsoft.AspNet.Mvc.Core/Filters/IExceptionFilter.cs

@@ -0,0 +1,8 @@
+using Microsoft.AspNet.Mvc.Filters;
+
+namespace Microsoft.AspNet.Mvc
+{
+    public interface IExceptionFilter : IFilter<ExceptionFilterContext>
+    {
+    }
+}

src/Microsoft.AspNet.Mvc.Core/Filters/IFilterOfTContext.cs

@@ -0,0 +1,10 @@
+using System;
+using System.Threading.Tasks;
+
+namespace Microsoft.AspNet.Mvc.Filters
+{
+    public interface IFilter<T>
+    {
+        Task Invoke(T context, Func<T, Task> next);
+    }
+}