动态显示WPF ListView中的形状

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="WPF ListView Shapes" Height="450" Width="800">
    <Grid>
        <ListView ItemsSource="{Binding Shapes}">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <Grid>
                        <Rectangle Width="50" Height="50" Fill="{Binding Color}" />
                    </Grid>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </Grid>
</Window>

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows;
using System.Windows.Media;

namespace WpfApp1
{
    public partial class MainWindow : Window
    {
        public ObservableCollection<ShapeModel> Shapes { get; set; }

        public MainWindow()
        {
            InitializeComponent();
            DataContext = this;

            Shapes = new ObservableCollection<ShapeModel>();
            Shapes.Add(new ShapeModel { Color = Brushes.Red });
            Shapes.Add(new ShapeModel { Color = Brushes.Blue });
            Shapes.Add(new ShapeModel { Color = Brushes.Green });
        }
    }

    public class ShapeModel : INotifyPropertyChanged
    {
        private Brush _color;

        public Brush Color
        {
            get { return _color; }
            set
            {
                _color = value;
                OnPropertyChanged("Color");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}