FPGACoder/HandyControl/HandyControl_Shared/Themes/Styles/Base/ImageSelectorBaseStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
                    xmlns:hc="clr-namespace:HandyControl.Controls"
                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">

    <Style x:Key="ImageSelectorBaseStyle" TargetType="hc:ImageSelector">
        <Setter Property="Focusable" Value="False"/>
        <Setter Property="Stretch" Value="UniformToFill"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="StrokeThickness" Value="1"/>
        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
        <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
        <Setter Property="StrokeDashArray" Value="2,2"/>
        <Setter Property="hc:IconSwitchElement.Geometry" Value="{StaticResource AddGeometry}"/>
        <Setter Property="hc:IconSwitchElement.GeometrySelected" Value="{StaticResource RemoveGeometry}"/>
        <Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="hc:ImageSelector">
                    <Button Command="interactivity:ControlCommands.Switch" Style="{StaticResource ButtonCustom}" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch">
                        <Border Background="{TemplateBinding Background}" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}">
                            <hc:DashedBorder BorderDashArray="{TemplateBinding StrokeDashArray}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" BorderDashThickness="{TemplateBinding StrokeThickness}" Background="{TemplateBinding PreviewBrush}" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}">
                                <Border Width="30" Height="30" Background="{TemplateBinding Background}" Style="{StaticResource BorderCircular}">
                                    <hc:ToggleBlock IsChecked="{TemplateBinding HasValue}">
                                        <hc:ToggleBlock.CheckedContent>
                                            <Path Data="{TemplateBinding hc:IconSwitchElement.GeometrySelected}" Width="12" Height="12" Fill="{DynamicResource PrimaryBrush}"/>
                                        </hc:ToggleBlock.CheckedContent>
                                        <hc:ToggleBlock.UnCheckedContent>
                                            <Path Data="{TemplateBinding hc:IconSwitchElement.Geometry}" Width="16" Height="16" Fill="{DynamicResource PrimaryBrush}"/>
                                        </hc:ToggleBlock.UnCheckedContent>
                                    </hc:ToggleBlock>
                                </Border>
                            </hc:DashedBorder>
                        </Border>
                    </Button>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
            </Trigger>
        </Style.Triggers>
    </Style>

</ResourceDictionary>