<Trigger Property="Text" Value="{x:Static system:String.Empty}">
<Setter Property="Foreground" TargetName="PART_SearchButton" Value="{StaticResource BackgroundMetalicBrush}"/>
<Setter Property="Foreground" TargetName="searchOptions" Value="{StaticResource BackgroundMetalicBrush}"/>
<Setter Property="Visibility" TargetName="PlaceHolderTextBlock" Value="Visible"/>
</Trigger>
<Trigger Property="IsKeyboardFocused" Value="True">
<Setter Property="Foreground" TargetName="PART_SearchButton" Value="{Binding Foreground, RelativeSource={RelativeSource TemplatedParent}}"/>