private void button2_Click(object sender, EventArgs e)
{
this.Hide();
var form1 = new mainupdatestudent();
form1.Closed += (s, args) => this.Close();
form1.Show();
}
private void button19_Click_1(object sender, EventArgs e)
{
this.Hide();
var student = new mainupdatestudent();
student.Closed += (s, args) => this.Close();
student.Show();
}
