public void Dashboard()
{
btnDashboard.Checked = true;
var frm = new frmDashboard();
frm.TopLevel = false;
panel3.Controls.Add(frm);
frm.BringToFront();
frm.Show();
}
private void BtnDashboard_Click(object sender, EventArgs e)
{
btnDashboard.Checked = true;
btnStudent.Checked = false;
btnBook.Checked = false;
btnIssueBook.Checked = false;
btnHistory.Checked = false;
btnReports.Checked = false;
btnUserAccount.Checked = false;
btnSettings.Checked = false;
frmDashboard frm = new frmDashboard();
frm.TopLevel = false;
panel3.Controls.Add(frm);
frm.BringToFront();
frm.Show();
}