using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

public class Program

{

        public static void Main(string[] args)

        {

            List<CostCenter> cc = new List<CostCenter>();

            cc.Add(new CostCenter("a", "70", new DateTime(2019, 11, 10)));

            cc.Add(new CostCenter("b", "30", new DateTime(2019, 11, 10)));

            cc.Add(new CostCenter("A", "40", new DateTime(2019, 11, 05)));

            cc.Add(new CostCenter("B", "60", new DateTime(2019, 11, 05)));

            cc.Add(new CostCenter("XX", "10", new DateTime(2019, 11, 01)));

            cc.Add(new CostCenter("YY", "90", new DateTime(2019, 11, 01)));

            cc.Add(new CostCenter("100", "50", new DateTime(2009, 07, 03)));

            cc.Add(new CostCenter("110", "50", new DateTime(2009, 07, 03)));

            DateTime threshold = new DateTime(2010, 11, 01);

            List<CostCenter> result = cc.Where(x => x.start.Date > threshold.Date).ToList();

​

            foreach (var item in result)

            {

                Console.WriteLine("center: " + item.center + " Percentage: " + item.percentage + " start: " + item.start);

            }

        }

    public class CostCenter

    {

        //I would urge you to use properties Here

        public  string center;

        public string percentage;

        public DateTime start;

​

        public CostCenter(string c, string p, DateTime dt)

        {

            center = c;

            percentage = p;

            start = dt;

        }

    }

}