How to get dates between two dates Using C#.net

private List<datetime> GetDatesBetween (DateTime startDate , DateTime endDate)
        {
            List<datetime> allDates = new List<datetime>();
            for (DateTime date = startDate; date <= endDate; date = date.AddDays(1))
                allDates.Add(date);
            return allDates;

        }

DateTime dt1 = new DateTime(2012, 5, 1);
        DateTime dt2 = DateTime.Now;

        DropDownList ddl = new DropDownList();
        while (dt1 < dt2)
        {
            ddl.Items.Add(dt1.ToString("dd-MMM-yyyy"));
            dt1.AddDays(1);
        }