c#.net fill data to already defined columns in datagridview

 private void frmFind_Load(object sender, EventArgs e)
        {
            DataSet ds = new DataSet();
            string sql = "SELECT cuccd,cucna FROM incoun";
            using (SqlConnection connection = ConnectionManager.GetConnection())
            {
                SqlCommand command = new SqlCommand(sql, connection);
                SqlDataAdapter adp = new SqlDataAdapter(command);
                adp.Fill(ds,"INCOUN");
                dataGridView1.AutoGenerateColumns = false;

                dataGridView1.DataSource = ds.Tables["incoun"];
            }
}