private void FillClientsNameByID_CB() { String phone = _queries.ClientPhoneById(CB_ClientKey.SelectedItem.ToString()); if (phone.Length > 0) { TB_PhoneNumber.Text = phone; } else { TB_PhoneNumber.Text = String.Empty; } CB_Client.Text = _queries.ClientsNameByID(CB_ClientKey.SelectedItem.ToString()); }