private void addButton_Click(object sender, RoutedEventArgs e) { string[] sQA = { answerTB.Text.Trim(), answerTB2.Text.Trim() }; student = new Student(firstNameTB.Text, usernameTB1.Text, passwordTB.Text, sQA); if (answerTB.Text.Trim() == "" || answerTB2.Text.Trim() == "" || firstNameTB.Text.Trim() == "" || usernameTB1.Text.Trim() == "" || passwordTB.Text.Trim() == "") { MessageBox.Show("Please enter all information"); } else { FileReadWrite file = new FileReadWrite(); file.AddStudentToFile(student); homeScreen hs = new homeScreen(student); this.Close(); hs.Show(); } }