Add project files.

Framework/WPF/Routing/RouteDescriptorCollection.cs

@@ -0,0 +1,12 @@
+using System.Collections.Generic;
+
+namespace TheXamlGuy.Framework.WPF
+{
+    public class RouteDescriptorCollection : List<IRouteDescriptor>, IRouteDescriptorCollection
+    {
+        public RouteDescriptorCollection(IEnumerable<IRouteDescriptor> collection) : base(collection)
+        {
+
+        }
+    }
+}