private void chart3_Click(object sender, EventArgs e)
{
this.Hide();
chart3 c = new chart3();
c.ShowDialog();
this.Show();
}
//Button click function which redirects to chart 3(column chart)
private void button3_Click(object sender, EventArgs e)
{
this.Hide();
chart3 ch3 = new chart3();
ch3.ShowDialog();
this.Close();
}