Added ArrayCache

Author: khellang

src/Nancy.MSBuild/Nancy.csproj

@@ -236,6 +236,9 @@
     <Compile Include="..\Nancy\DefaultRootPathProvider.cs">
       <Link>DefaultRootPathProvider.cs</Link>
     </Compile>
+    <Compile Include="..\Nancy\ArrayCache.cs">
+      <Link>ArrayCache.cs</Link>
+    </Compile>
     <Compile Include="..\Nancy\DefaultRouteConfigurationProvider.cs">
       <Link>DefaultRouteConfigurationProvider.cs</Link>
     </Compile>
@@ -1520,11 +1523,11 @@
     </EmbeddedResource>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it.
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
   </Target>
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>

src/Nancy/ArrayCache.cs

@@ -0,0 +1,22 @@
+namespace Nancy
+{
+    /// <summary>
+    /// A cache for empty arrays.
+    /// </summary>
+    public class ArrayCache
+    {
+        /// <summary>
+        /// Gets a cached, empty array of the specified type.
+        /// </summary>
+        /// <typeparam name="T">the type of array to get.</typeparam>
+        public static T[] Empty<T>()
+        {
+            return EmptyArray<T>.Value;
+        }
+
+        private static class EmptyArray<T>
+        {
+            public static readonly T[] Value = new T[0];
+        }
+    }
+}