Help with multi-file downloader

[thisismyusername2010]

I want to create a program that can go into a parent directory, travel to each folder in the directory and then download each file from each folder. I'd also like to make it so that I can control the number of folders it downloads at a time, e.g. if there's 100 folders, then be able to tell it to download folders 1-10, then at another point tell it to download folders 11-20.
This is the code that I have so far:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        WebClient wc = new WebClient();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            List<string> linkList = new List<string>();
            string url = textBox1.Text;
            string source = workerclass.getsource(url);
       

            int startindex = source.IndexOf("folder.gif");
            source = source.Substring(startindex, source.Length - startindex);
            while (source.IndexOf("<a href=") != -1)
            {
                startindex = source.IndexOf("<a href=") + 9;
                int endindex = source.IndexOf("/", startindex);
                string link = source.Substring(startindex, endindex - startindex);
                string fullink = url + link;
                linkList.Add(fullink);
                source = source.Replace("<a href=" + @"""" + link, "");
            }
            foreach (string link in linkList)
            {

                List<string> linkList2 = new List<string>();
                string newurl = textBox1.Text;
                string source2 = workerclass.getsource(newurl);


                int startindex2 = source.IndexOf("folder.gif");
                source2 = source2.Substring(startindex, source2.Length - startindex2);
                while (source2.IndexOf("<a href=") != -1)
                {
                    startindex2 = source2.IndexOf("<a href=") + 9;
                    int endindex2 = source2.IndexOf("/", startindex);
                    string link2 = source.Substring(startindex2, endindex2 - startindex);
                    string fullink2 = newurl + link2;
                    linkList2.Add(fullink2);
                    source2 = source2.Replace("<a href=" + @"""" + link2, "");
                }
                foreach (string link2 in linkList2)
                {

                    Uri reallink = new Uri(link2);
                    WebClient wc2 = new WebClient();
                    wc.DownloadFileAsync(reallink, link2+" file.zip");

                }
            }
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

Would this work to grab each file in each folder and download it? How would I tell it how many/which folders to download at one time as I previously mentioned?

[Omegadarkest]

You want to be able to download file 1-10 at the same time so your downloading all 10 at once?