private void Choose_Click(object sender, EventArgs e)
{
Choose.Hide();
lblWelcome.Hide();
lblOption.Hide();
Residential.Show();
Commercial.Show();
Industrial.Show();
PeakHours.Hide();
OffPeak.Hide();
lblEnter.Hide();
txtInput.Hide();
btnCalculate.Hide();
btnClear.Hide();
Output.Hide();
btnExit.Hide();
}