split in two.cs

using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace Test44
{

    public class License
    {
        public string ID { get; set; }
        public string Device { get; set; }
        public string Country { get; set; }
        public string Start { get; set; }
        public string End { get; set; }
        public int DaysLeft { get; set; }
        public override string ToString()
        {
            return $"{ID} - Device: {Device}, Country: {Country}, Warranty Start: {Start}, Warranty End: {End}, Days Left: {DaysLeft}";
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            string filename = args.Length == 1 ? args[0] : "hits.txt";
            string[] lines = File.ReadAllLines(filename);
            List<License> Licenses = new List<License>();
            foreach(var line in lines)
            {
                string[] data = line.Split(':', ',', '-');
                Licenses.Add(new License
                {
                    ID = data[0].Trim(),
                    Device = data[2].Trim(),
                    Country = data[4].Trim(),
                    Start = data[6].Trim(),
                    End = data[8].Trim(),
                    DaysLeft = int.Parse(data.Last())
                });
            }
            if(!Directory.Exists(Path.Combine(Directory.GetCurrentDirectory(), "Over30")))
                Directory.CreateDirectory(Path.Combine(Directory.GetCurrentDirectory(), "Over30"));
            if (!Directory.Exists(Path.Combine(Directory.GetCurrentDirectory(), "Under30")))
                Directory.CreateDirectory(Path.Combine(Directory.GetCurrentDirectory(), "Under30"));

            var files = Licenses.Where(x => x.DaysLeft <= 30).GroupBy(x => x.Device).Select(x => x);
            foreach(var f in files)
            {
                File.WriteAllLines(Path.Combine(Directory.GetCurrentDirectory(), "Under30", $"{f.Key}.txt"), f.Select(x => x.ToString()).ToArray());
            }
            files = Licenses.Where(x => x.DaysLeft > 30).GroupBy(x => x.Device).Select(x => x);
            foreach (var f in files)
            {
                File.WriteAllLines(Path.Combine(Directory.GetCurrentDirectory(), "Over30", $"{f.Key}.txt"), f.Select(x => x.ToString()).ToArray());
            }

            //File.WriteAllLines(Path.Combine(Directory.GetCurrentDirectory(), "Under30", "text1.txt"), Licenses.Where(x => x.DaysLeft <= 30).Select(x => x.ToString()).ToArray());
            //File.WriteAllLines(Path.Combine(Directory.GetCurrentDirectory(), "Over30", "text1.txt"), Licenses.Where(x => x.DaysLeft > 30).Select(x => x.ToString()).ToArray());
        }

    }
}