Csharp Birden Çok forma bilgi aktarma

üç farklı Datagridview İlk datagridview ıdsıne tıklayınca diğer iki datagridview o Id göre bilgi getirme

 private void Form1_Load(object sender, EventArgs e)

        {

            SqlDataAdapter adapter=new SqlDataAdapter("Select ID from OKUL",bag);

            DataSet ds=new DataSet();

            adapter.Fill(ds);

            dataGridView1.DataSource=ds.Tables[0];

        }

        int ID;

        private void dataGridView1_DoubleClick(object sender, EventArgs e)

        {

            SqlDataAdapter adapter=new SqlDataAdapter("Select AdSoyad,Memleket from OKUL where ID='"+ dataGridView1.SelectedCells[0].Value.ToString()+"'",bag);

            DataSet ds=new DataSet();

            adapter.Fill(ds);

            dataGridView2.DataSource=ds.Tables[0];

            SqlDataAdapter adapter2= new SqlDataAdapter("Select OKUL,DERS from OKUL where ID='" + dataGridView1.SelectedCells[0].Value.ToString() + "'", bag);

            DataSet ds2 = new DataSet();

            adapter2.Fill(ds2);

            dataGridView3.DataSource = ds2.Tables[0];

           

        }