public static string MakeActiveClass(this IUrlHelper urlHelper, string controller, string action)

        {

            try

            {

                string result = "active";

                string controllerName = urlHelper.ActionContext.RouteData.Values["controller"].ToString();

                string methodName = urlHelper.ActionContext.RouteData.Values["action"].ToString();

                if (string.IsNullOrEmpty(controllerName)) return null;

                if (controllerName.Equals(controller, StringComparison.OrdinalIgnoreCase))

                {

                    if (methodName.Equals(action, StringComparison.OrdinalIgnoreCase))

                    {

                        return result;

                    }

                }

                return null;

            }

            catch(Exception)

            {

                return null;

            }

        }