แนะนำการเก็บข้อมูลจาก textfile หน่อยครับ c# เก็บแยกเป็น arraylist (จำเป็นมากครับ)

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;

namespace WindowsFormsApplication5
{
    struct Arcs
    {
        public int u;
        public int v;
        public double s;
        public double t;
        public Arcs(int u1, int v1, double s1, double t1)
        {
            u = u1;
            v = v1;
            s = s1;
             t = t1;
           

        }
    }
    public partial class Form1 : Form
    {
        ArrayList myData;

        public Form1()
        {
            InitializeComponent();
            myData = new ArrayList();
            
        }

        public void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.ShowDialog();
            string fname = ofd.FileName;
            String line;
            try
            {
                StreamReader sr = new StreamReader(fname);
                string[] data = File.ReadAllLines(fname);
                int[] num = new int[4];
                textBox2.Text = data[0];
                textBox3.Text = data[2];
                textBox4.Text = data[1];
                textBox5.Text = data[3];
                textBox6.Text = ofd.FileName;
                line = sr.ReadLine();
                while (line != null)
                {
                    string[] words = line.Split(' ', '\b');
                    Arcs a = new Arcs(Convert.ToInt32(words[0]),Convert.ToInt32(words[1],Convert.Todouble32(words[2],Convert.Todouble32(words[3]);
                    //int aa = Convert.ToInt32(words[0]);
                    // myData.Add(a);
                    //textBox1.Text += line + "\r\n";
                    //textBox1.Text += words[2] + "\r\n";
                    line = sr.ReadLine();
                }
                sr.Close();

            }

            catch (Exception)
            {
            }
            finally
            {
            }
        }

        
                
    }

}