WPF ImageCheckButton

public class ImageCheckBox:CheckBox
{
static ImageCheckBox()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(ImageCheckBox), new FrameworkPropertyMetadata(typeof(ImageCheckBox)));
}

public Brush CheckedBackground
{
get { return (Brush)GetValue(CheckedBackgroundProperty); }
set { SetValue(CheckedBackgroundProperty, value); }
}

// Using a DependencyProperty as the backing store for CheckedBackground.  This enables animation, styling, binding, etc...
public static readonly DependencyProperty CheckedBackgroundProperty =
DependencyProperty.Register("CheckedBackground", typeof(Brush), typeof(ImageCheckBox));
}

<Style TargetType="{x:Type local:ImageCheckBox}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type CheckBox}">
<Border x:Name="bg" Cursor="Hand" Background="{TemplateBinding Background}"/>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Background" TargetName="bg" Value="{Binding CheckedBackground,RelativeSource={RelativeSource TemplatedParent}}"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Opacity" Value="0.8"/>
</Trigg
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</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>