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.IO;
using System.Collections;
using System.Diagnostics;

namespace replace
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string text;

            StreamReader sr = new StreamReader("c:\\replace\\4pp.csv");

            ArrayList line = new ArrayList();
            while ((text = sr.ReadLine()) != null)
            {
                line.Add(text);
            }
            StreamReader streamReader = new StreamReader("c:\\replace\\poep.txt");
            string final = streamReader.ReadToEnd();
            string newfinal = "";

            int i = 1;

            foreach (string plaats in line)
            {
                newfinal = final.Replace(plaats, i.ToString());
                i++;