回答編集履歴
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見直しキャンペーン中
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> あるいは変更通知付きのコレクションを使うとそういった手間が省けます。
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> ObservableStack<T> があるようです（試してはいません）
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試してみました。
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紹介しておいてなんですが、WPFではあまりテストしていなそうで現時点では自分で用意したほうがよさそうでした（既存アイテムがタプルとして表示されてしまう等）
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[WPF example is behaving weirdly · Issue #7 · Cysharp/ObservableCollections](https://github.com/Cysharp/ObservableCollections/issues/7)
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例えばこの辺りを使わせてもらうとこんな感じです。
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紹介しておいてなんですが、WPFではあまりテストしていなそうで現時点では自分で用意したほうがよさそうでした（既存アイテムがタプルとして表示されてしまう等）
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[c# - Observable Stack and Queue - Stack Overflow](https://stackoverflow.com/questions/3127136/observable-stack-and-queue/56177896#56177896)
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例えばこの辺りを使わせてもらうとこんな感じです。
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```x
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```xml
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<Window
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x:Class="Questions361141.MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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Width="800"
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Height="450">
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<DockPanel>
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<StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
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<Button Click="PushButton_Click" Content="Push" />
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<Button Click="PopButton_Click" Content="Pop" />
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</StackPanel>
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<ListView x:Name="listView" />
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</DockPanel>
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</Window>
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```
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```
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```cs
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.Windows;
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namespace Questions361141
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{
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// [c# - Observable Stack and Queue - Stack Overflow](https://stackoverflow.com/questions/3127136/observable-stack-and-queue/56177896#56177896)
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public class ObservableStack<T> : Stack<T>, INotifyCollectionChanged, INotifyPropertyChanged
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{
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public ObservableStack() : base() { }
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public ObservableStack(IEnumerable<T> collection) : base(collection) { }
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public ObservableStack(int capacity) : base(capacity) { }
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public new virtual T Pop()
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{
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var item = base.Pop();
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OnCollectionChanged(NotifyCollectionChangedAction.Remove, item);
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return item;
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}
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public new virtual void Push(T item)
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{
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base.Push(item);
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OnCollectionChanged(NotifyCollectionChangedAction.Add, item);
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}
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public new virtual void Clear()
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{
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base.Clear();
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OnCollectionChanged(NotifyCollectionChangedAction.Reset, default);
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}
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public virtual event NotifyCollectionChangedEventHandler CollectionChanged;
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protected virtual void OnCollectionChanged(NotifyCollectionChangedAction action, T item)
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{
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base.Push(item);
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CollectionChanged?.Invoke(this, new NotifyCollectionChangedEventArgs(action, item, item == null ? -1 : 0));
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OnPropertyChanged(nameof(Count));
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}
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public new virtual void Clear()
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{
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base.Clear();
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OnCollectionChanged(NotifyCollectionChangedAction.Reset, default);
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}
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public virtual event NotifyCollectionChangedEventHandler CollectionChanged;
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protected virtual void OnCollectionChanged(NotifyCollectionChangedAction action, T item)
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{
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CollectionChanged?.Invoke(this, new NotifyCollectionChangedEventArgs(action, item, item == null ? -1 : 0));
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OnPropertyChanged(nameof(Count));
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}
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public virtual event PropertyChangedEventHandler PropertyChanged;
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protected virtual void OnPropertyChanged(string proertyName) => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(proertyName));
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}
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public partial class MainWindow : Window
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{
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private readonly ObservableStack<int> numbers;
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public MainWindow()
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{
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InitializeComponent();
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numbers = new ObservableStack<int>();
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numbers.Push(1);
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numbers.Push(2);
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numbers.Push(3);
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listView.ItemsSource = numbers;
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}
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private void PushButton_Click(object sender, RoutedEventArgs e)
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=> numbers.Push(numbers.Count + 1);
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private void PopButton_Click(object sender, RoutedEventArgs e)
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=> numbers.Pop();
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}
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}
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```
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