public MainViewModel() { // DialogService is used to handle dialogs this.DialogService = new MvvmDialogs.DialogService(); _listData = new ObservableCollection <SampleModel>() { new SampleModel() { Name = "姫路しかま", Address = "兵庫県姫路市", Age = 25, Birthday = new DateTime(1974, 1, 12), Job = "プログラマー" }, new SampleModel() { Name = "元町もとこ", Address = "兵庫県神戸市中央区", Age = 45, Birthday = new DateTime(1988, 1, 12), Job = "SE" }, }; SelectionListData = ListData.First(); CalendarCollection = new CalendarCollectionModel(InputDatetime); #region non meaning // クラスの宣言 var classlist = new List <SampleModel>() { new SampleModel() { Name = "名前1", Age = 10, Address = "姫路", }, new SampleModel() { Name = "名前2", Age = 20, Address = "姫路", }, new SampleModel() { Name = "名前3", Age = 30, Address = "姫路", }, new SampleModel() { Name = "なまえ4", Age = 40, Address = "神戸", }, }; // 「名前」を含む人を取り出す var linq1 = classlist.Where(x => x.Name.Contains("名前")); // 年齢の合計 var linq2 = classlist.Sum(x => x.Age); // 「名前:年齢:住所」で転写 Func <SampleModel, string> formatMember = x => x.Name + ":" + x.Age.ToString() + ":" + x.Address; var linq3 = classlist.Select(formatMember); ListData.Aggregate(new ObservableCollection <SampleModel>(), (x, y) => x); #endregion }