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;

namespace Q1064245
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private int[,] arr;

        int x = 0;

        int y = 0;

        private void arrToTextBox(int[,] arr)
        {
            panel1.Controls.Clear();
            x = arr.GetLength(0);
            y = arr.GetLength(1);
            for (int i = 0; i < x; i++)
            {
                for (int j = 0; j < y; j++)
                {
                    TextBox txt = new TextBox();
                    txt.Name = string.Format("txt_{0}_{1}", i, j);
                    panel1.Controls.Add(txt);
                    txt.Top = i * 40;
                    txt.Left = j * 120;
                    txt.Text = arr[i, j].ToString();
                    txt.TextChanged += new EventHandler(txt_TextChanged);
                }
            }
        }

        void txt_TextChanged(object sender, EventArgs e)
        {
            var arr = textBoxToArr();
            propertyGrid1.SelectedObject = arr;
        }

        private int[,] textBoxToArr()
        { 
            int[,] arr = new int[x, y];
            for (int i = 0; i < x; i++)
            {
                for (int j = 0; j < y; j++)
                {
                    arr[i, j] = int.Parse((panel1.Controls["txt_" + i.ToString() + "_" + j.ToString()] as TextBox).Text);
                }
            }
            return arr;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int[] dim = textBox1.Text.Split('*').Select(x => int.Parse(x)).ToArray();
            arr = new int[dim[0], dim[1]];
            propertyGrid1.SelectedObject = arr;
            arrToTextBox(arr);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofn = new OpenFileDialog();
            if (ofn.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                var data = File.ReadAllLines(ofn.FileName).Select(x => x.Split(',').Select(y => int.Parse(y)).ToArray()).ToArray();
                int[,] arr = new int[data.Count(), data[0].Count()];
                for (int i = 0; i < data.Count(); i++)
                {
                    for (int j = 0; j < data[0].Count(); j++)
                    {
                        arr[i, j] = data[i][j];
                    }
                }
                propertyGrid1.SelectedObject = arr;
                arrToTextBox(arr);
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                var arr = textBoxToArr();
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < x; i++)
                {
                    if (i != 0) sb.Append("\r\n");
                    for (int j = 0; j < y; j++)
                    {
                        if (j != 0) sb.Append(',');
                        sb.Append(arr[i, j].ToString());
                    }
                }
                File.WriteAllText(sfd.FileName, sb.ToString());
            }

        }
    }
}

完整代码下载：https://download.csdn.net/download/caozhy/12337231

//用于保存二维数组
List<int[]> lstArray= new List<int[]>();
//保存第一个
int[] arry1={1,2,3,4};
lstArray.Add(arry1);
//保存第二个
int[] arry2={4,3,2,1};
lstArray.Add(arry2);

//写文件示意代码
foreach(var line in lstArray)
{
  file.WriteLine(line);
}
file.save();

//加载文件
file.load("array.txt");
while(!file.EOF)
{
int[] temp=file.readline();
lstArray.Add(temp);
file.next();
}