Move generic Get/Set into Interface

src/Microsoft.AspNet.Http.Features/FeatureCollection.cs

@@ -93,6 +93,16 @@ namespace Microsoft.AspNet.Http.Features
             }
         }
 
+        public TFeature Get<TFeature>()
+        {
+            return (TFeature)this[typeof(TFeature)];
+        }
+
+        public void Set<TFeature>(TFeature instance)
+        {
+            this[typeof(TFeature)] = instance;
+        }
+
         private class KeyComparer : IEqualityComparer<KeyValuePair<Type, object>>
         {
             public bool Equals(KeyValuePair<Type, object> x, KeyValuePair<Type, object> y)

src/Microsoft.AspNet.Http.Features/FeatureCollectionExtensions.cs

@@ -1,30 +0,0 @@
-// Copyright (c) .NET Foundation. All rights reserved.
-// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
-
-namespace Microsoft.AspNet.Http.Features
-{
-    public static class FeatureCollectionExtensions
-    {
-        /// <summary>
-        /// Retrieves the requested feature from the collection.
-        /// </summary>
-        /// <typeparam name="TFeature">The feature key.</typeparam>
-        /// <param name="features">The collection.</param>
-        /// <returns>The requested feature, or null if it is not present.</returns>
-        public static TFeature Get<TFeature>(this IFeatureCollection features)
-        {
-            return (TFeature)features[typeof(TFeature)];
-        }
-
-        /// <summary>
-        /// Sets the given feature in the collection.
-        /// </summary>
-        /// <typeparam name="TFeature">The feature key.</typeparam>
-        /// <param name="features">The collection.</param>
-        /// <param name="instance">The feature value.</param>
-        public static void Set<TFeature>(this IFeatureCollection features, TFeature instance)
-        {
-            features[typeof(TFeature)] = instance;
-        }
-    }
-}

src/Microsoft.AspNet.Http.Features/IFeatureCollection.cs

@@ -27,5 +27,19 @@ namespace Microsoft.AspNet.Http.Features
         /// <param name="key"></param>
         /// <returns>The requested feature, or null if it is not present.</returns>
         object this[Type key] { get; set; }
+
+        /// <summary>
+        /// Retrieves the requested feature from the collection.
+        /// </summary>
+        /// <typeparam name="TFeature">The feature key.</typeparam>
+        /// <returns>The requested feature, or null if it is not present.</returns>
+        TFeature Get<TFeature>();
+
+        /// <summary>
+        /// Sets the given feature in the collection.
+        /// </summary>
+        /// <typeparam name="TFeature">The feature key.</typeparam>
+        /// <param name="instance">The feature value.</param>
+        void Set<TFeature>(TFeature instance);
     }
 }

src/Microsoft.AspNet.Owin/OwinFeatureCollection.cs

@@ -358,6 +358,16 @@ namespace Microsoft.AspNet.Owin
             throw new NotSupportedException();
         }
 
+        public TFeature Get<TFeature>()
+        {
+            return (TFeature)this[typeof(TFeature)];
+        }
+
+        public void Set<TFeature>(TFeature instance)
+        {
+            this[typeof(TFeature)] = instance;
+        }
+
         IEnumerator IEnumerable.GetEnumerator()
         {
             return GetEnumerator();