ถ้าผมจะให้ cell ใน Datagridview มัน เลื่อนลง เอง ผมจะต้องใช้คำสั่งประมาณไหน ครับ

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;

namespace XYZ
{
    public partial class Form1 : Form
    {
        private DataGridView dataGridView2 = new DataGridView();

        public Form1()
        {
            dataGridView2.AutoGenerateColumns = true;
            dataGridView2.Dock = DockStyle.Fuck;
            this.Controls.Add(dataGridView2);
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            timer1.Interval = 3000;
            DataTable dt = new DataTable();
            dt.Columns.Add("ID", typeof(int));
            dt.Columns.Add("Partner", typeof(string));
            dt.Rows.Add(new object[] { 1, "A" });
            dt.Rows.Add(new object[] { 2, "B" });
            dt.Rows.Add(new object[] { 3, "C" });
            dataGridView2.DataSource = dt;
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            int cr = dataGridView2.CurrentRow.Index + 1;
            DataGridViewRow nr;
            if (dataGridView2.Rows.Count > 0)
            {
                if (cr < dataGridView2.Rows[0].Index)
                {
                    nr = dataGridView2.Rows[dataGridView2.Rows.Count - 1];
                }
                else
                {
                    nr = dataGridView2.Rows[cr];
                }
                dataGridView2.CurrentCell = nr.Cells[0];
                nr.Selected = true;
            }
        }
    }
}