List<TextBox> list = new List<TextBox>();
        Size size = new Size(30, 30);

        private void panelListArray_Paint(object sender, PaintEventArgs e)
        {
            int x = 30;
            int y = 45;
            for (int i = 0; i <= 9; i++)
            {
                TextBox textbox = new TextBox();
                textbox.Location = new Point(x + i * size.Width, y);
                textbox.Multiline = true;
                textbox.Size = size;
                textbox.TextAlign = HorizontalAlignment.Center;
                panelListArray.Controls.Add(textbox);
                list.Add(textbox);
            }
        }