I have a DataGridView it contain table to convert into CSV file

private void button1_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                TxtPath.Text = openFileDialog1.FileName;
            }
     
            string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+TxtPath.Text+"";
              DataSet ds = new DataSet();
              OleDbConnection conn = new OleDbConnection(connString);
             OleDbCommand cmd = new OleDbCommand("SELECT AttendanceLogId,AttendanceDate,EmployeeId,InTime,InDeviceId,OutTime from AttendanceLogs  ", conn);
             conn.Open();
             OleDbDataAdapter da = new OleDbDataAdapter(cmd);
             
da.Fill(ds, "AttendanceLogs");
dataGridView1.DataSource = ds;
dataGridView1.DataMember = "AttendanceLogs";
   conn.Close();

         

        }
    }