private void lectureWindowToolStripMenuItem_Click(object sender, EventArgs e)
{
Lecturer lecWin = new Lecturer();
this.Close();
lecWin.ShowDialog();
this.Show();
}
private void addLecturerToolStripMenuItem_Click(object sender, EventArgs e)
{
Lecturer lectfrom = new Lecturer();
lectfrom.ShowDialog();
this.Show();
}