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C# LINQ & Extension method continued

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Also extended C# LINQ and Extension method (simple) to include the last (MAX) Date Created property, added a new Folder class (model) with properties and included them in a List. Also, amended the LINQ statement to get the MAX(Date Created) .

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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.IO;
  6.  
  7. namespace CentreFolderDeduper
  8. {
  9.     class Program
  10.     {
  11.         static void Main(string[] args)
  12.         {
  13.             String[] centreFolders = Directory.GetDirectories(args[0]);
  14.             List<Folder> folders = new List<Folder>();
  15.  
  16.             foreach(var centreFolder in centreFolders)
  17.             {
  18.                 if (centreFolder.IndexOf('-') != -1)
  19.                 {
  20.                     var newFolder = new Folder {
  21.                                         ShortName = centreFolder.Left(centreFolder.IndexOf('-')),
  22.                                         DateCreated = System.IO.File.GetCreationTime(centreFolder)};
  23.                     folders.Add(newFolder);
  24.                 }
  25.             }
  26.  
  27.             var duplicateFolders = from f in folders
  28.                                    group f by f.ShortName into g
  29.                                    where g.Count() > 1
  30.                                    select new { CentreFolderName = g.Key,
  31.                                                 CentreFolderNameCount = g.Count(),
  32.                                                 LastDateCreated = g.Max(f => f.DateCreated) };
  33.  
  34.             Console.WriteLine(duplicateFolders.Count());
  35.             ObjectDumper.Write(duplicateFolders);
  36.             Console.ReadKey();
  37.         }
  38.     }
  39. }
  40.  
  41. class Folder
  42.     {
  43.         public String Directoty { get; set; }
  44.         public String ShortName { get; set; }
  45.         public DateTime DateCreated { get; set; }
  46.     }
  47.  
  48.  public static string Left(this string str, int count)
  49.         {
  50.             if (string.IsNullOrEmpty(str) || count < 1)
  51.                 return string.Empty;
  52.             else
  53.                 return str.Substring(0, Math.Min(count, str.Length));
  54.         }

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