AG-AIRS/resources/CheckBoxStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style x:Key="CheckBoxStyle" TargetType="{x:Type CheckBox}">
        <Setter Property="SnapsToDevicePixels" Value="true" />
        <Setter Property="OverridesDefaultStyle" Value="False" />
        <Setter Property="FocusVisualStyle" Value="{DynamicResource CheckBoxFocusVisual}" />
        <Setter Property="Height" Value="25"/>
        <Setter Property="IsChecked" Value="False"/>
        <Setter Property="Margin" Value="0,20"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="CheckBox">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>
                        <Grid Height="{TemplateBinding Height}" Width="{TemplateBinding Height}">
                            <Rectangle x:Name="CheckBoxRectangle" Fill="LightSkyBlue" Opacity="0.3" RadiusY="5" RadiusX="5"/>
                            <Rectangle x:Name="CheckBoxRectangleOut" Stroke="#FF06DAD1" StrokeThickness="1" RadiusY="5" RadiusX="5"/>
                            <Grid x:Name="CheckedMark" Width="20" Height="20" Visibility="Collapsed">
                                <Path SnapsToDevicePixels="False" StrokeThickness="3" Data="M1,9 L10,17" Stroke="White"/>
                                <Path SnapsToDevicePixels="False" StrokeThickness="3" Data="M8,17 L20,4" Stroke="White"/>
                            </Grid>
                        </Grid>
                        <TextBlock Grid.Column="1" FontSize="18" Foreground="#FF02A7F0" VerticalAlignment="Center" Margin="14,0,0,0" Text="{Binding Content,RelativeSource={RelativeSource TemplatedParent}}"/>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter TargetName="CheckedMark" Property="Visibility" Value="Visible"></Setter>
                            <Setter TargetName="CheckBoxRectangle" Property="Fill" Value="#FF00A8E0"></Setter>
                            <Setter TargetName="CheckBoxRectangle" Property="Opacity" Value="1"></Setter>
                            <Setter TargetName="CheckBoxRectangleOut" Property="Stroke" Value="Transparent"></Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    
</ResourceDictionary>