--- a/mcs/class/System.Web.Routing/System.Web.Routing/RouteBase.cs	2015-05-08 18:00:15.000000000 +0300
+++ b/mcs/class/System.Web.Routing/System.Web.Routing/RouteBase.cs	2015-07-20 14:13:09.215784924 +0300
@@ -41,5 +41,19 @@
 	{
 		public abstract RouteData GetRouteData (HttpContextBase httpContext);
 		public abstract VirtualPathData GetVirtualPath (RequestContext requestContext, RouteValueDictionary values);
+
+		// Default needs to be true to avoid breaking change 
+		private bool _routeExistingFiles = true; 
+		public bool RouteExistingFiles
+		{
+			get
+			{
+				return _routeExistingFiles;
+			}
+			set
+			{
+				_routeExistingFiles = value;
+			}
+		}
 	}
 }