在wpf开发中遇到子控件会继承父类控件属性的问题，
例如：
<StackPanel Orientation="Horizontal" Grid.Row="1" Background="Black" Opacity="0.3">
<Label Content="{Binding Id}" Foreground="White" VerticalAlignment="Center"></Label>
<Label Content="{Binding Name}" Foreground="White" VerticalAlignment="Center"></Label>
</StackPanel>
此时两个Label都会继承stackPanel的Opacity属性，如果想要不继承透明属性，这时候需要用到笔刷，代码如下：
<SolidColorBrush Color="Black" Opacity=".3" x:Key="OpacityBrush"/>
<StackPanel Orientation="Horizontal" Grid.Row="1" Background="{StaticResource OpacityBrush}">
<Label Content="{Binding Id}" Foreground="White" VerticalAlignment="Center"></Label>
<Label Content="{Binding Name}" Foreground="White" VerticalAlignment="Center"></Label>
</StackPanel>