How Do I Search Data Base In C Sharp With Ms Access Data Base , And How Can I Diply Two Tabel Record In C Sharp With Forigen Key ,,?

OleDbConnection Dc = new OleDbConnection("Provider=Microsoft.Ace.OLEDB.12.0; Data Source=D:\\Dat.accdb");
        OleDbDataAdapter DA = new OleDbDataAdapter();
        DataSet dset = new DataSet();
        DataView Dv = new DataView();
        void fillData()
        {
            Dc.Open();
            DA.SelectCommand = new OleDbCommand();
            DA.SelectCommand.Connection = Dc;
            DA.SelectCommand.CommandText = "Select* From Table1";
            dset = new DataSet();
            DA.Fill(dset, "T1");
            Dv = new DataView(dset.Tables["T1"]);
            Dc.Close();

        }

        void BindtextBoxes()
        {
            textBox1.DataBindings.Clear();
            textBox2.DataBindings.Clear();
            textBox3.DataBindings.Clear();
            //textBox4.DataBindings.Clear();
           // textBox5.DataBindings.Clear();
            textBox1.DataBindings.Add("Text", Dv, "ID");
            textBox2.DataBindings.Add("Text", Dv, "Name");
            textBox3.DataBindings.Add("Text", Dv, "Marks");
           // textBox4.DataBindings.Add("Text", Dv, "Address");
          //  textBox5.DataBindings.Add("Text", Dv, "Age");
        }