private void addYearGroupToolStripMenuItem_Click(object sender, EventArgs e)
{
YearGroup yearGFrom = new YearGroup();
yearGFrom.ShowDialog();
this.Show();
}
private void yearGroupWindowToolStripMenuItem_Click(object sender, EventArgs e)
{
YearGroup ygWin = new YearGroup();
this.Hide();
ygWin.ShowDialog();
this.Show();
}
private void yearGroupOptionsToolStripMenuItem_Click(object sender, EventArgs e)
{
YearGroup ygWin = new YearGroup();
ygWin.ShowDialog();
this.Close();
}