Get Weekly Business dates for a given two dates range

Question

I want to generate weekly business dates between two dates excluding weekends and holidays. So I want a results

 

week 1

StartDate {2/18/2019 12:00:00 AM}

EndDate{2/25/2019 12:00:00 AM---wrong end date} ---> 2/27/2019 correct end date

 

week 2

StartDate {2/25/2019 12:00:00 AM}

EndDate{3/4/2019 12:00:00 AM--wrong end date}----->3/6/2019 -- correct end date

 

Below is my code. Any help will be appreciated

class Program
    {
        public class WeekStartEnd
        {
            public DateTime firstDate;
            public DateTime SecondDate;
        }
        static void Main(string[] args)
        {
            //usage:
            DateTime StartDate = DateTime.Parse("02/12/2019");
            DateTime SeriesEndDate = DateTime.Parse("12/31/2025");

            DateTime firstMonday = Enumerable.Range(1, (SeriesEndDate - StartDate).Days +1)
                .SkipWhile(x => StartDate.AddDays(x).DayOfWeek != DayOfWeek.Monday)
                .Select(x => StartDate.AddDays(x))
                .First();

            TimeSpan ts = (TimeSpan)(SeriesEndDate - firstMonday);

            List<WeekStartEnd> dates = new List<WeekStartEnd>();

            for (int i = 0; i < ts.Days; i += 7)
            {

                dates.Add(new WeekStartEnd() { firstDate = firstMonday.AddDays(i), SecondDate = firstMonday.AddDays(i + 7) });
            }


            Console.WriteLine(dates);

            }
        }
    }