private void SalesService_Load(object sender, EventArgs e) { dgvProduct.EnableHeadersVisualStyles = false; dgvProduct.ColumnHeadersDefaultCellStyle.BackColor = Color.FromArgb(40, 40, 40); dgvProduct.DataSource = pbo.getServDataTableSale(); foreach (User user in ubo.getLinkedUser()) { if (user.type.Equals("Cliente")) { clients.AddLast(user); cmbClients.Items.Add(user.dni + " - " + user.name); } } lblFactura.Text = sbo.generateCode(); }