WPF引用外部样式

1、Window页面这样引用 

<Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries> 
                <ResourceDictionary Source="pack://application:,,,/COSMO.IM.Resources;component/Css/DataGridCss.xaml"/>
            </ResourceDictionary.MergedDictionaries>
            <Style x:Key="contentCenterStyle" TargetType="{x:Type TextBlock}">
                <Setter Property="VerticalAlignment" Value="Center" />
            </Style>
            <Style TargetType="{x:Type Label}">
                <Setter Property="Foreground" Value="White"/>
                <Setter Property="Background" Value="Transparent"/>
                <Setter Property="Padding" Value="5"/>
                <Setter Property="HorizontalContentAlignment" Value="Left"/>
                <Setter Property="VerticalContentAlignment" Value="Top"/>
            </Style>
        </ResourceDictionary>
    </Window.Resources> 

2、用户控件页面这样引用 

  <UserControl.Resources>
        <ResourceDictionary>
            <Style x:Key="dgCell" TargetType="TextBlock">
                <Setter Property="HorizontalAlignment" Value="Center"/>
                <Setter Property="VerticalAlignment" Value="Center"/>
            </Style>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/COSMO.IM.Resources;component/Css/DataGridCss.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </UserControl.Resources>