同事拿了一隻網路捉的 C# 程式叫我幫他改

public Form1()
        {
            InitializeComponent();
            DataTable MyDataTable = new DataTable();
            MyDataTable.Columns.Add("Index");
            MyDataTable.Columns.Add("Column1");
            for (int j = 0; j < 5; j++)
            {
                 MyDataTable.Rows.Add(j,j.ToString());
            }
            this.dataGridView1.DataSource = MyDataTable;
            this.dataGridView1.ReadOnly = true;
            this.dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
        }

 
        private void dataGridView1_CellPainting_1(object sender, DataGridViewCellPaintingEventArgs e)
        {
            Rectangle Rectangle1 = this.dataGridView1.GetCellDisplayRectangle(0, 0, true);
            Rectangle Rectangle2 = this.dataGridView1.GetCellDisplayRectangle(0, 1, true);
            Rectangle Rectangle3 = this.dataGridView1.GetCellDisplayRectangle(0, 2, true);
            Rectangle Rectangle4 = this.dataGridView1.GetCellDisplayRectangle(0, 3, true);
            Rectangle ..

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