lowercase urls - add this to your global.asax.cs

public void Application_BeginRequest(Object sender, EventArgs e)
        {

            // Check url
            if (Regex.IsMatch(HttpContext.Current.Request.Url.ToString(), @"[A-Z]") == true)
            {

                // Lowercase url
                String lower = HttpContext.Current.Request.Url.ToString().ToLower();

                // Redefine response
                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.Status = "301 Moved Permanently";
                HttpContext.Current.Response.AddHeader("Location", lower);
                HttpContext.Current.Response.End();

            }

        } // Application_BeginRequest


public class LowerRoute : Route
    {

        public LowerRoute(String url, IRouteHandler handler) : base(url, handler) { }

        public LowerRoute(String url, RouteValueDictionary defaults, IRouteHandler handler) : base(url, defaults, handler) { }

        public LowerRoute(String url, RouteValueDictionary defaults, RouteValueDictionary constraints, IRouteHandler handler) : base(url, defaults, constraints, handler) { }

        public LowerRoute(String url, RouteValueDictionary defaults, RouteValueDictionary constraints, RouteValueDictionary tokens, IRouteHandler handler) : base(url, defaults, constraints, tokens, handler) { }

        public override VirtualPathData GetVirtualPath(RequestContext context, RouteValueDictionary values)
        {

            VirtualPathData path = base.GetVirtualPath(context, values);
            if (path != null)
                path.VirtualPath = path.VirtualPath.ToLowerInvariant();
            return path;

        } // VirtualPathData

    } // LowerRoute