//Going to exam management form when click on exam management button form dashboard
private void examdash_Click(object sender, EventArgs e)
{
ExamManagement exm = new ExamManagement();
this.Hide();
exm.ShowDialog();
}
//Opening ExamManagement page when click on Exammanagement button
private void button5_Click(object sender, EventArgs e)
{
ExamManagement ex = new ExamManagement();
this.Hide();
ex.ShowDialog();
}