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;
}
}