using System;
using System.Collections;
using System.IO;
 
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                DriveInfo[] allDrives = DriveInfo.GetDrives();
 
                //enumerates top level of subfolders on C:
                //sorted by NM=names, DC=create, DA=access, DW=write
                EnumFolders(allDrives[0], "NM");
            }
            catch (IOException ex)
            {
                Console.WriteLine(
                    "IO Exception: " + ex.Message);
            }
            catch (Exception ex)
            {
                Console.WriteLine(
                    "Exception: " + ex.Message);
            }
 
            Console.ReadKey();
        }
 
        //compares two directories using names or dates
        class DirectoryInfoComparer : IComparer
        {
            protected string compareMode;
            public DirectoryInfoComparer(string _compareMode)
            {
                compareMode = _compareMode;
            }
 
            #region IComparer Members
 
            public int Compare(object x, object y)
            {
                DirectoryInfo d1 = x as DirectoryInfo;
                if (d1 == null) throw new InvalidCastException();
 
                DirectoryInfo d2 = y as DirectoryInfo;
                if (d2 == null) throw new InvalidCastException();
 
                switch (compareMode)
                {
                    case "DC":
                        return DateTime.Compare(
                            d1.CreationTime, d2.CreationTime);
                    case "DA":
                        return DateTime.Compare(
                            d1.LastAccessTime, d2.LastAccessTime);
                    case "DW":
                        return DateTime.Compare(
                            d1.LastWriteTime, d2.LastWriteTime);
                    case "NM":
                        return string.Compare(
                            d1.FullName, d2.FullName);
                    default:
                        throw new ArgumentException();
                }
            }
 
            #endregion
        }
 
        static void EnumFolders(DriveInfo di, string sortMode)
        {
            DirectoryInfo rootInfo = 
                new DirectoryInfo(di.RootDirectory.ToString());
 
            //enumerating subdirectories on the top level
            DirectoryInfo[] subDirs = 
                rootInfo.GetDirectories();
 
            //sorting subdirectories
            Array.Sort(subDirs, new DirectoryInfoComparer(sortMode));
 
            //dispaying list of subdirectories
            foreach (DirectoryInfo subDir in subDirs)
            {
                Console.WriteLine(subDir.FullName.PadRight(40) + 
                    subDir.CreationTime.ToUniversalTime());
            }
        }
    }
}