private void StudentButton_Click(object sender, EventArgs e)
        {
            string A = "";

            this.Hide();
            CategoryForm options = new CategoryForm();

            using (StudentLoginForm StudentLogin = new StudentLoginForm())
            {
                StudentLogin.ShowDialog();
                if (StudentLogin.showcat())
                {
                    stud.Email = StudentLogin.GetEmail();
                    stud.Name  = StudentLogin.GetName();
                    options.ShowDialog();
                    if (options.done())
                    {
                        options.Close();
                        stud.setTopics(options.GetTopics());
                        NumOfQ = options.QNum();
                    }
                    foreach (var s in options.GetTopics())
                    {
                        A += s.ToString();
                    }
                    MessageBox.Show(stud.Name + stud.Email + A + NumOfQ.ToString());
                }
            }
        }
        private void StuLoginNextButton_Click(object sender, EventArgs e)
        {
            if ((NameTextBox.Text != "") && (EmailTextBox.Text != ""))
            {
                studentInfo();
                this.Hide();
                CategoryForm options = new CategoryForm();
                options.Show();

                if (options.done())
                {
                    catdone = true;
                }
            }
            else
            {
                if (NameTextBox.Text == "")
                {
                    MessageBox.Show("Please Enter A Name !", "", MessageBoxButtons.OK);
                }
                else if (EmailTextBox.Text == "")
                {
                    MessageBox.Show("Please Enter An E-mail !", "", MessageBoxButtons.OK);
                }
            }
        }