private void btnTechnical_Click(object sender, EventArgs e)
{
TechnicalOperationsupportDepartment tosd = new TechnicalOperationsupportDepartment();
this.Hide();
tosd.Show();
}
private void btnBack_Click(object sender, EventArgs e)
{
TechnicalOperationsupportDepartment PM = new TechnicalOperationsupportDepartment();
this.Hide();
PM.Show();
}