private void button14_Click_1(object sender, EventArgs e)
{
this.Hide();
StudentAv upwork = new StudentAv();
upwork.Show();
}
private void button13_Click_2(object sender, EventArgs e)
{
if (!NotAvilableTime.Instance.pnlContainer.Controls.ContainsKey("StudentAv"))
{
StudentAv std = new StudentAv();
std.Dock = DockStyle.Fill;
NotAvilableTime.Instance.pnlContainer.Controls.Add(std);
}
NotAvilableTime.Instance.pnlContainer.Controls["StudentAv"].BringToFront();
}