如何以编程方式将WPF控件的颜色设置为系统颜色

    <SolidColorBrush x:Key="SystemColorBrush" Color="{x:Static SystemColors.ControlTextColor}" />
</Application.Resources>

<TextBlock Text="Hello, World!" Foreground="{StaticResource SystemColorBrush}" />

TextBlock textBlock = new TextBlock();
textBlock.Text = "Hello, World!";
textBlock.Foreground = new SolidColorBrush(SystemColors.ControlTextColor);