[2.0] Update requires a valid InsertCommand when passed DataRow collection with new r

[arshesander]

why this code doesnt work?

            string ConStr = "Provider=Microsoft.Jet.OleDB.4.0; Data Source =" + Application.StartupPath + "\\Employee.mdb";
            OleDbConnection Conn = new OleDbConnection(ConStr);

            Conn.Open();

            OleDbCommand Cmd = new OleDbCommand("Select * from Employee", Conn);
            OleDbDataAdapter dAdapter = new OleDbDataAdapter(Cmd);
            DataSet dDataSet = new DataSet();
	dAdapter.Fill(dDataSet, "Employee");

            DataRow AddNewRow = dDataSet.Tables["Employee"].NewRow();
            AddNewRow["EmployeeID"] = textBox1.Text;
            AddNewRow["EmployeeName"] = textBox2.Text;

            dDataSet.Tables["Employee"].Rows.Add(AddNewRow);
            dAdapter.Update(dDataSet, "Employee");

            Conn.Close();

the error is:

"Update requires a valid InsertCommand when passed DataRow collection with new rows"