private void выбратьКлиентаToolStripMenuItem_Click(object sender, EventArgs e) { FormPicExtensionClients fpec = new FormPicExtensionClients(db); fpec.ShowDialog(); List <int> idExtensionRepairs = db.GetExtensionWorksForPickClient(fpec.currentRow); CreateTab(fpec.currentRow.ToString(), idExtensionRepairs, fpec.quantityDays); if (tabControl1.TabCount != 0) { toolStripBtDeleteClient.Enabled = true; } }