car rental 3, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{

public class Program
{
    readonly List<int> startDates = new List<int> { 0, 1, 10, 5, 12, 13, 40, 30, 22, 70, 19 };
    readonly List<int> endDates = new List<int> { 0, 23, 12, 10, 29, 25, 66, 35, 33, 100, 65 };
    public readonly List<Tuple<int, int>> startEndDates = new List<Tuple<int, int>>();

public Program()
    {
        GetDates();
    }

public void GetDates ()
    {
        if (startDates.Count != endDates.Count) return;
        for (int i = 0; i < startDates.Count; i++)
        {
            startEndDates.Add(Tuple.Create(startDates[i], endDates[i]));
        }            
    }

public static void Main(string[] args)
    {
        var data = new Program();
        var a = data.startEndDates;

var b = a.OrderBy(t => t.Item2).ToList();
        List<Tuple<int, int>> result = new List<Tuple<int, int>>();

result.Add (a.OrderBy(t => t.Item2).First());

while (b.Count>0)
        {
            if (b.First().Item1 >= result[result.Count - 1].Item2) result.Add(b.First());
            b.Remove(b.First());
        }
          foreach(Tuple<int,int> t in result) {
              Console.WriteLine(t.ToString());
          }
    }

}
}

Show compiler warnings [ + ] Show input
Compilation time: 0,19 sec, absolute running time: 0,11 sec, cpu time: 0,11 sec, average memory usage: 15 Mb, average nr of threads: 3