Đọc File text bằng C#

Đọc File text bằng C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Windows.Forms;
using System.Drawing;

namespace NhapDuLieu
{
   public class DuLieuFileTxt
    {
        private int _n; // Số phần tử

        public int N
        {
            get { return _n; }
            set { _n = value; }
        }
        private List> _MaTran; // Bảng

        public List> MaTran
        {
            get { return _MaTran; }
            set { _MaTran = value; }
        }
       //Thêm header cho listview
        public ColumnHeader AddColumnListView(string Text)
        {
            ColumnHeader HeaderCol = new ColumnHeader();
            HeaderCol.Text = Text;
            HeaderCol.Width = 50;
            HeaderCol.TextAlign = HorizontalAlignment.Center;
            HeaderCol.AutoResize(ColumnHeaderAutoResizeStyle.HeaderSize);
            return HeaderCol;
        }

        public List> LoadFile(string fileName, ListView lv)
        {
            StreamReader fin = new StreamReader(fileName);

            this._MaTran = new List>();

            this._n = Convert.ToInt32(fin.ReadLine());
            string line = "";
            List row;

            lv.Columns.Add(AddColumnListView("P(X,Y)"));

            for (int iX = 0; iX < this._n; ++iX)
            {
                line = fin.ReadLine();
                string[] words = line.Split(' ');

                lv.Columns.Add(AddColumnListView("Y"+(iX + 1).ToString())); //Tiêu đề cột
                ListViewItem lvi = new ListViewItem("X" + (iX + 1).ToString()); //Tiêu đề dòng
                lvi.UseItemStyleForSubItems = false;

                row = new List();
                for (int iY = 0; iY < this._n; ++iY)
                {
                    // list view sub item
                    ListViewItem.ListViewSubItem col = lvi.SubItems.Add(words[iY]);
                    col.ForeColor = Color.Blue; // mau cua list view subitem                    
                    row.Add(iY);
                }
                this._MaTran.Add(row);
                lv.Items.Add(lvi);
            }
            fin.Close();
            return this._MaTran;
        }
    }
}