Bepaal omvang directories

Code

using System;
using System.Data;
using System.IO;
 
namespace Sc.QuickTools
{
    class DirectorySize
    {
        private DataTable m_directoryTable;
        public DataTable DirectoryTable
        {
            get { return m_directoryTable; }
        }
 
        public DirectorySize()
        {
            m_directoryTable = new DataTable();
            m_directoryTable.Columns.Add("path");
            m_directoryTable.Columns.Add("size", typeof(long));
        }
 
        public long SetDirSize(string path)
        {
            long size = 0;
 
            DirectoryInfo dir = new DirectoryInfo(path);
 
            try
            {
                foreach (DirectoryInfo subFolder in dir.GetDirectories())
                {
                    size += SetDirSize(subFolder.FullName);
                }
 
                foreach (FileInfo file in dir.GetFiles())
                {
                    size = size + file.Length;
                }
            }
            catch (Exception ex)
            {
                string msg = string.Format("Error: {0}", ex.Message);
                Console.WriteLine(msg);
            }
 
            m_directoryTable.Rows.Add(new object[] { path, size });
 
            return size;
        }
    }
 
    class Program
    {
        public struct Param
        {
            public string RootFolder;
            public string SortOrder;
            public int TopCount;
 
            public Param(string[] args)
            {
                RootFolder = "";
                SortOrder = "size desc";
                TopCount = int.MaxValue;
 
                if (args.Length == 0)
                {
                    Console.WriteLine("Display (sub)folder sizes in KB.\n");
                    Console.WriteLine("dirsize [drive:][path][filename] [-sa|sd] [n]\n");
                    return;
                }
                if ((args.Length) > 0) RootFolder = args[0];
                if ((args.Length) > 1)
                {
                    if (args[1] == "-sa") SortOrder = "size asc";
                    if (args[1] == "-sd") SortOrder = "size desc";
                }
                if ((args.Length) > 2) TopCount = int.Parse(args[2]);
            }
        }
 
        static void Main(string[] args)
        {
            // arg[0] is root dir  
            // arg[1] is sort asc / desc
            // arg[2] is top x
 
            TimeSpan startTime = DateTime.Now.TimeOfDay;
 
            DirectorySize dirsize = new DirectorySize();
            Param parameter = new Param(args);
            if (parameter.RootFolder == "") return;
            dirsize.SetDirSize(parameter.RootFolder);
            dirsize.DirectoryTable.DefaultView.Sort = parameter.SortOrder;
            int i = 0;
            foreach (DataRowView row in dirsize.DirectoryTable.DefaultView)
            {
                i++;
                if (i == parameter.TopCount) break;
                decimal size = Convert.ToInt64(row[1]) / (1024 ^ 2);
                Console.WriteLine("{0} {1}",
                (size.ToString("N0") + " KB").PadRight(15, ' '), row[0]);
            }
            Console.WriteLine(" {0} Folder(s)",
            dirsize.DirectoryTable.DefaultView.Count);
 
            double processingTime =
            DateTime.Now.TimeOfDay.Subtract(startTime).TotalMilliseconds;
            Console.WriteLine(" Processing time: {0} seconds",
            (processingTime / 1000).ToString("N3"));
        }
    }
}