How I Hold Previous Data And Current Data In Datagridview

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

namespace WindowsFormsApplication7_urgentbillfinal
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void fillToolStripButton_Click(object sender, EventArgs e)
        {
            try
            {
                this.urgentbillTableAdapter.Fill(this.esdataDataSet.urgentbill, new System.Nullable<int>(((int)(System.Convert.ChangeType(vnoToolStripTextBox.Text, typeof(int))))), new System.Nullable<System.DateTime>(((System.DateTime)(System.Convert.ChangeType(vdtToolStripTextBox.Text, typeof(System.DateTime))))));
            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }
    }
}