kmpdfkit_demo/Demo/Examples/Compdfkit_Tools/DigitalSignature/AddCertificationControl/AddCertificationControl.xaml

<UserControl x:Class="Compdfkit_Tools.DigitalSignature.AddCertificationControl.AddCertificationControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:Compdfkit_Tools.DigitalSignature.AddCertificationControl"
             mc:Ignorable="d"
             Height="500"
             Width="462">
    <Grid Margin="10,10,10,0">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Label Grid.Row="0" Content="Select the type of Digital ID:" FontSize="14" FontFamily="Segoe UI" FontWeight="Bold" Padding="0,4,0,4" Width="187" HorizontalAlignment="Left"></Label>
        <RadioButton Grid.Row="1" GroupName="ChooseCertification" Margin="0,20,0,20" >
            <RadioButton.Template>
                <ControlTemplate TargetType="RadioButton">
                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                        <RadioButton IsChecked="{TemplateBinding IsChecked}" VerticalAlignment="Center" Margin="10,0,10,0"/>

                        <Border BorderThickness="1" BorderBrush="Black" Width="386" Height="80">
                            <StackPanel Orientation="Horizontal">
                                <Image Width="32" Height="32" VerticalAlignment="Center" Margin="10,0,10,0"/>
                                <StackPanel Orientation="Vertical" VerticalAlignment="Center">
                                    <Label Content="Use a Digital ID from a file" FontSize="14" FontFamily="Segoe UI" FontWeight="Bold" Padding="0,4,0,4"/>
                                    <Label Content="Import an existing Digital ID that you have obtained as a file" FontSize="12" FontFamily="Segoe UI"  Padding="0,4,0,4"/>
                                </StackPanel>
                            </StackPanel>
                        </Border>
                    </StackPanel>
                </ControlTemplate>
            </RadioButton.Template>
        </RadioButton>
        <RadioButton Grid.Row="2" GroupName="ChooseCertification" Margin="0,2,0,10">
            <RadioButton.Template>
                <ControlTemplate TargetType="RadioButton">
                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                        <RadioButton IsChecked="{TemplateBinding IsChecked}" VerticalAlignment="Center" Margin="10,0,10,0"/>

                        <Border BorderThickness="1" BorderBrush="Black" Width="386" Height="80">
                            <StackPanel Orientation="Horizontal">
                                <Image Width="32" Height="32" VerticalAlignment="Center" Margin="10,0,10,0"/>
                                <StackPanel Orientation="Vertical" VerticalAlignment="Center">
                                    <Label Content="Use a Digital ID from a file" FontSize="14" FontFamily="Segoe UI" FontWeight="Bold" Padding="0,4,0,4"/>
                                    <Label Content="Create your self-signed Digital ID" FontSize="12" FontFamily="Segoe UI"  Padding="0,4,0,4"/>
                                </StackPanel>
                            </StackPanel>
                        </Border>
                    </StackPanel>
                </ControlTemplate>
            </RadioButton.Template>
        </RadioButton>

        <StackPanel Grid.Row="3" Margin="10,20,10,20" Width="407">
            <TextBlock  FontSize="12" FontFamily="Segoe UI" Foreground="#43474D" TextWrapping="Wrap" Background="#F2F2F2" Padding="12,10,12,10"
                           Text="A Digital ID is required to create a digital signature. The most secure Digital ID are issued by trusted Certificate authorities and are based on secure devices like smart card or token. Some are based on files."/>
            <TextBlock  FontSize="12" FontFamily="Segoe UI" Foreground="#43474D" TextWrapping="Wrap" Background="#F2F2F2"/>
            <TextBlock  FontSize="12" FontFamily="Segoe UI" Foreground="#43474D" TextWrapping="Wrap" Background="#F2F2F2" Padding="12,10,12,10"
                           Text="You can also create a new Digital ID, but they provide a low level of identity assurance."/>
        </StackPanel>
        <StackPanel Grid.Row="4" Orientation="Horizontal" HorizontalAlignment="Right">
            <Button Content="Cancel"  Margin="0,0,10,0" Width="112" Height="32" BorderThickness="1"></Button>
            <Button x:Name="ContinueBtn" Content="Continue" Width="112" Height="32" BorderThickness="1" Click="ContinueBtn_Click"></Button>
         
        </StackPanel>
    </Grid>
</UserControl>