private void AddButton_Click(object sender, EventArgs e) { if (TableTabPage.SelectedIndex == 0) { try { _studentsService.AddStudent(new Student { Name = NameTextBox.Text, Age = Convert.ToInt32(AgeTextBox.Text), Group_Id = Convert.ToInt32(GroupIdTextBox.Text) }); } catch { } } else { _studentsService.AddGroup(new Group { Title = GroupsTitleTextBox.Text }); } ResetButton_Click(null, null); }