Linq sorting

I use LINQ -SQL and returns a List that needs to have a customized sorting


Example
List data = FindShareOfGrowth(lstCountries, new DateTime(2009,10,5))

this needs to have a customized sorting

like

data.ChartSort()

        public List FindShareOfGrowth(List lstCountry, DateTime minDate)
        {
            var db = new ValueUpDBDataContext();
            var queryNN = FindAllNNHelper(db, lstCountry, minDate);
            var queryAll = FindAllMinMaxNNHelper(db, chartNr, lstCountry, minDate);

            queryAll.ToList(); 
            var query = from nn in queryNN
                        join all in queryAll on new { K1 = nn.DateRange, K2 = nn.Name }
                        equals new { K1 = all.DateRange, K2 = all.Name }
                        select new ChartData
                        {
                            Name = nn.Name,
                            DateRange = nn.DateRange,
                            Value = nn.Value / all.ValueAbs,
                            Volume = nn.Volume / all.VolumeAbs
                        };
            return query.OrderBy(c => c.DateRange).ThenBy(c => c.Name).ToList();
        }