private void button1_Click(object sender, EventArgs e) { Osoba foundStudent = studentTable.FindStudent(textBox1.Text, textBox2.Text); List <Predmet> foundSubjects = subjectTable.FindSubject(foundStudent); string subjectText = ""; foreach (Predmet predmet in foundSubjects) { subjectText += predmet.Nazev.ToString() + " " + predmet.Ucitel.Jmeno + " " + predmet.Ucitel.Prijmeni + " " + System.Environment.NewLine; } MessageBox.Show("Nalezena osoba :" + foundStudent.Jmeno + " " + foundStudent.Prijmeni + ":" + System.Environment.NewLine + subjectText); }