Styles and triggers in wpf

App.xaml contains the following:

<Application x:Class="KiramUI.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     开发者_JAVA百科    StartupUri="Member.xaml">
<Application.Resources>
    <Style TargetType="{x:Type TextBox}">
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="BitmapEffect">
                    <Setter.Value>
                        <OuterGlowBitmapEffect GlowColor="Gold" GlowSize="10"></OuterGlowBitmapEffect>
                    </Setter.Value>
                </Setter>
            </Trigger>
        </Style.Triggers>
    </Style>
</Application.Resources>

And the Member.xaml has the following:

<TextBox  Height="23" Name="textBox1" Width="188" Padding="0" Margin="2" />
<TextBox Height="23" Name="textBox2" Width="183" Margin="2" HorizontalAlignment="Left" />

inside a StackPanel inside a Grid. But it does not change the style when I put mouse over the control. Am I missing anything ?

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I'm assuming you are targeting .NET 4, if so this feature was removed.