Silverlight4按钮的文字变色

经过N次的折腾后，终于解决了Silverlight4的按钮文字变色的问题.
利用MExpressionBlend创建Button的副本，生成Style样式代码，修改如下：
 

<UserControl.resources>
<Style x:Key="LoginBtnStyle" TargetType="Button">
...
<Border x:Name="BACkground" 
	BorderBrush="{TemplateBinding BorderBrush}" 
	BorderThickness="{TemplateBinding BorderThickness}" 
	BACkground="White" 
	CornerRadius="3">
	<Grid BACkground="{TemplateBinding BACkgrounD}" Margin="1">
		<Border x:Name="BACkgroundAnimation" BACkground="#FF448DCA" Opacity="0"/>
		<Rectangle x:Name="BACkgroundGradient">
			<Rectangle.Fill>
				<LinearGradientBrush EndPoint=".7,1" StartPoint=".7,0">
					<GradientStop Color="#FFFFFFFF" Offset="0"/>
					<GradientStop Color="#F9FFFFFF" Offset="0.375"/>
					<GradientStop Color="#E5FFFFFF" Offset="0.625"/>
					<GradientStop Color="#C6FFFFFF" Offset="1"/>
				</LinearGradientBrush>
			</Rectangle.Fill>
		</Rectangle>
	</Grid>
</Border>
<ContentPresenter x:Name="contentPresenter" 
	ContentTemplate="{TemplateBinding ContentTemplatE}" 
	Content="{TemplateBinding Content}" 
	HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
	VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
	Margin="{TemplateBinding Padding}" />
...
</Style>

把<ContentPresenter ... /> 标签改为<TextBlock ..../>

<TextBlock x:Name="btnName" 
	Text="{TemplateBinding Content}"									
	...>

添加动画状态，例如MouSEOver

<VisualState x:Name="MouSEOver">
	<Storyboard>
		<ColorAnimation Duration="0" 
			To="#FF00FF00" 
			Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)" 
			Storyboard.TargetName="btnName" />
		<DoubleAnimation Duration="0"
			To="20" 
			Storyboard.TargetProperty="(TextBlock.FontSizE)"
			Storyboard.TargetName="btnName" />
		<DoubleAnimation ... />
	</Storyboard>
</VisualState>

生成项目，运行后，当鼠标移上按钮时，文字颜色，字体大小也改变。 注：暂不清楚<ContentPresenter ... />换成<TextBlock ... />对此按钮会带来怎么样的限制，有待验证。