private void FormChooseToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Hide();

            // Close and clear all data.
            EmployeesLV.ClearAllData();
            EmployeesPanel.ClearAllData();

            EmployeesLV.Close();
            EmployeesPanel.Close();

            Database.CloseConnection();

            button7.Enabled = false;
            button7.Text    = "Оберіть працівника";

            if (!SelectProject())
            {
                Application.ExitThread();
            }

            Show();
        }