winApp C# สอบถามวิธี เช็ค BindingSource ว่ามีการ เปลี่ยนแปลงข้อมูลหรือปล่าว ครับ

private void frmTest_Bindingsource_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the '_Asset_2DataSet.Person' table. You can move, or remove it, as needed.
            this.personTableAdapter.Fill(this._Asset_2DataSet.Person);

        }

        private void personBindingSource_AddingNew(object sender, AddingNewEventArgs e)
        {
             richTextBox1.Text += "\n personBindingSource_AddingNew " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture);
        }

        private void personBindingSource_CurrentChanged(object sender, EventArgs e)
        {
             richTextBox1.Text += "\n personBindingSource_CurrentChanged " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture);
        }

        private void personBindingSource_BindingComplete(object sender, BindingCompleteEventArgs e)
        {
             richTextBox1.Text += "\n personBindingSource_BindingComplete " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture);
        }

        private void personBindingSource_CurrentItemChanged(object sender, EventArgs e)
        {
            richTextBox1.Text += "\n personBindingSource_CurrentItemChanged " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture);
        }

        private void personBindingSource_ListChanged(object sender, ListChangedEventArgs e)
        {
            richTextBox1.Text += "\n personBindingSource_ListChanged " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture);
        }