How to customize RadioButton in WPF?

Question

I'm trying to customize the RadioButton button, but nothing changes in it. Why? And how to customize RadioButton to make it look like this: this is how it should look like

Also, can you tell me how to make the size of a round button 24x24? And how to implement its on/off?

That's how I tried to do it:

    <RadioButton x:Name="CS" Width="24" Height="24" 
Background="#9183E5" BorderBrush="#333335" BorderThickness="2" 
Checked="CS_Checked" Unchecked="CS_Unchecked" 
HorizontalAlignment="Center" VerticalAlignment="Center"/>

Control templates - Windows apps | Microsoft Learn

ΩmegaMan
– ΩmegaMan

2025-04-07 19:06:26 +00:00
Commented Apr 7 at 19:06 — ΩmegaMan
– ΩmegaMan, Commented Apr 7 at 19:06

S.Nieshant · Accepted Answer · 2025-04-08 07:52:25Z

I’ve created a resource dictionary for the radio button style. You can customize the colors as needed. I hope you find it helpful! The center button in the attached image represents the selected radio button.

Below is the radio button style.

<Style TargetType="RadioButton">
    <Setter Property="Background" Value="Transparent"/>
    <Setter Property="BorderBrush" Value=" #404040"/>
    <Setter Property="BorderThickness" Value="2"/>
    <Setter Property="Height" Value="50"/>
    <Setter Property="Width" Value="50"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="RadioButton">
                <Border x:Name="bd" CornerRadius="25" Height="{TemplateBinding Height}" Width="{TemplateBinding Width}" Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
                    <Ellipse x:Name="ec"   Width="40"    Height="40"    Fill="#cce0ff"    />
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsChecked" Value="True">
                        <Setter TargetName="ec" Property="Fill" Value="#0047b3"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

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