Move UseMiddleware from RequestContainer to Http.Extensions.

src/Microsoft.AspNet.Http.Extensions/UseMiddlewareExtensions.cs

@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Linq;
+using System.Reflection;
+using Microsoft.Framework.DependencyInjection;
+
+namespace Microsoft.AspNet.Builder
+{
+    public static class UseMiddlewareExtensions
+    {
+        public static IApplicationBuilder UseMiddleware<T>(this IApplicationBuilder builder, params object[] args)
+        {
+            return builder.UseMiddleware(typeof(T), args);
+        }
+
+        public static IApplicationBuilder UseMiddleware(this IApplicationBuilder builder, Type middleware, params object[] args)
+        {
+            return builder.Use(next =>
+            {
+                var typeActivator = builder.ApplicationServices.GetService<ITypeActivator>();
+                var instance = typeActivator.CreateInstance(builder.ApplicationServices, middleware, new[] { next }.Concat(args).ToArray());
+                var methodinfo = middleware.GetMethod("Invoke", BindingFlags.Instance | BindingFlags.Public);
+                return (RequestDelegate)methodinfo.CreateDelegate(typeof(RequestDelegate), instance);
+            });
+        }
+    }
+}

src/Microsoft.AspNet.Http.Extensions/project.json

@@ -1,13 +1,17 @@
 {
     "version": "1.0.0-*",
     "dependencies": {
-        "Microsoft.AspNet.Http": "1.0.0-*"
+        "Microsoft.AspNet.Http": "1.0.0-*",
+        "Microsoft.Framework.DependencyInjection": "1.0.0-*"
     },
     "frameworks" : {
         "aspnet50" : {
         },
         "aspnetcore50" : { 
             "dependencies": {
+                "System.Reflection": "4.0.10-beta-*",
+                "System.Reflection.Extensions": "4.0.0-beta-*",
+                "System.Reflection.TypeExtensions": "4.0.0-beta-*",
                 "System.Runtime": "4.0.20-beta-*"
             }
         }