private void Form1_Load(object sender, EventArgs e)
{
dean = student = officer = doctor = login = register = Student_Affairs_Officer = false;
log_btn.Visible = false;
register_btn.Visible = false;
ok_btn.Visible = false;
mail_txt.Visible = false;
password_txt.Visible = false;
mail_lbl.Visible = false;
pass_lbl.Visible = false;
//#########################3
student_obj = new Student();
student_obj.load();
doctor_obj = new Doctor();
doctor_obj.load();
Officer_obj = new Officer();
Officer_obj.load();
}