UWP通过绑定改变TextBox的前景颜色

<TextBox Text="{Binding TextValue}" Foreground="{Binding TextColor}" />

public class TextBoxModel : INotifyPropertyChanged
{
    private string textValue;
    public string TextValue
    {
        get { return textValue; }
        set
        {
            textValue = value;
            OnPropertyChanged(nameof(TextValue));
        }
    }

    private SolidColorBrush textColor;
    public SolidColorBrush TextColor
    {
        get { return textColor; }
        set
        {
            textColor = value;
            OnPropertyChanged(nameof(TextColor));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

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

public MainPage()
{
    InitializeComponent();
    DataContext = new TextBoxModel();
}

((TextBoxModel)DataContext).TextValue = "Hello World";
((TextBoxModel)DataContext).TextColor = new SolidColorBrush(Colors.Red);