private void SaleForm_Load(object sender, EventArgs e)
{
CustomerORM csOrm = new CustomerORM();
cmbCustomer.DataSource = csOrm.Select();
cmbCustomer.DisplayMember = "Name";
cmbCustomer.ValueMember = "id";
RoomsORM rOrm = new RoomsORM();
cmbRoom.DataSource = rOrm.Select();
cmbRoom.DisplayMember = "Name";
cmbRoom.ValueMember = "id";
ProductORM pOrm = new ProductORM();
dataGridView1.DataSource = pOrm.Select();
}
