问题描述
在Blend 4 RC我正在编辑一个tabitem的样式（在一个干净的项目上），一切都很好，但在项目中，我有一个网格，默认颜色为，当我将其更改为黑色为示例并尝试将样式应用于第二个tabitem此矩形
保持其默认颜色。每次我想添加一个项目，我必须改变这种颜色。这很奇怪！我错过了什么！
In Blend 4 RC i am editing the style of a tabitem (on a clean project) and everything is ok but in the item i have a grid that has a default color on and when i change it to black for example and try to apply the style to a second tabitem this rectangle stays with its default color. And every time i want to add an item i have to change this color. This is odd! Am i missing something!
< sdk：TabItem Header =" TabItem" Style =" {StaticResource DarkTabItem}">
&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; <网格背景="＃FFE5E5E5">
<sdk:TabItem Header="TabItem" Style="{StaticResource DarkTabItem}">
<Grid Background="#FFE5E5E5">
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