Create a resultant list from another two list by a condition. You can change " r2.Id == r.Id" this part for different logics

LinqListFiltering

       [TestMethod]
        public void LinqTest()
        {
            RouteManager manager = new RouteManager();
            ResponseModel responseModel = manager.Search(new RouteRequestModel());
            List<Route> routes = responseModel.Data as List<Route>;
            List<Route> permittedRoutes = new List<Route>
            {
                new Route() {Id = 2},
                new Route() {Id = 9},
                new Route() {Id = 10},
                new Route() {Id = 11},
                new Route() {Id = 19}
            };
            IEnumerable<Route> selectedRoutes = routes.Where(r => permittedRoutes.Any(r2 => r2.Id == r.Id)).ToList();
            Assert.IsTrue(selectedRoutes.Any());
        }