private void button_Click(object sender, RoutedEventArgs e)
        {
            string nameText = this.textBox1.Text;
            string schoolText = this.textBox.Text;

            // school変数に学校名を設定
            School school = new School();
            school.Name = schoolText;

            // データベースにschoolを登録
            this.context.School.InsertOnSubmit(school);
            this.context.SubmitChanges();

            // student変数に氏名を設定
            Student student = new Student();
            student.Name = nameText;
            student.SchoolId = school.Id;

            // データベースにstudentを登録
            this.context.Student.InsertOnSubmit(student);
            this.context.SubmitChanges();

            // 画面表示用コレクションにschoolを登録
            this.observableStudent.Add(student);
            this.dataGrid.ItemsSource = this.observableStudent;
        }
 partial void DeleteSchool(School instance);
 partial void UpdateSchool(School instance);
 partial void InsertSchool(School instance);