Adding Defauld values and change OuterBorderWidth

src/Avalonia.Controls/ToggleSwitch.cs

@@ -15,14 +15,14 @@ namespace Avalonia.Controls
     public class ToggleSwitch : ToggleButton
     {
         public static readonly StyledProperty<object> OffContentProperty =
-         AvaloniaProperty.Register<ToggleSwitch, object>(nameof(OffContent));
+         AvaloniaProperty.Register<ToggleSwitch, object>(nameof(OffContent), defaultValue:"Off");
 
         public static readonly StyledProperty<IDataTemplate> OffContentTemplateProperty =
             AvaloniaProperty.Register<ToggleSwitch, IDataTemplate>(nameof(OffContentTemplate));
 
 
         public static readonly StyledProperty<object> OnContentProperty =
-      AvaloniaProperty.Register<ToggleSwitch, object>(nameof(OnContent));
+      AvaloniaProperty.Register<ToggleSwitch, object>(nameof(OnContent), defaultValue: "On");
 
         public static readonly StyledProperty<IDataTemplate> OnContentTemplateProperty =
             AvaloniaProperty.Register<ToggleSwitch, IDataTemplate>(nameof(OnContentTemplate));

src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml

@@ -349,7 +349,7 @@
     <!--<x:Double x:Key="ToggleSwitchOnStrokeThickness">0</x:Double>-->
     <Thickness x:Key="ToggleSwitchOnStrokeThickness">0</Thickness>
     <!--<x:Double x:Key="ToggleSwitchOuterBorderStrokeThickness">1</x:Double>-->
-    <Thickness x:Key="ToggleSwitchOuterBorderStrokeThickness">1.5</Thickness>
+    <Thickness x:Key="ToggleSwitchOuterBorderStrokeThickness">1</Thickness>
     <StaticResource x:Key="ToggleSwitchContentForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
     <StaticResource x:Key="ToggleSwitchContentForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
     <StaticResource x:Key="ToggleSwitchHeaderForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />

src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesLight.xaml

@@ -350,7 +350,7 @@
     
     <Thickness x:Key="ToggleSwitchOnStrokeThickness">0</Thickness>
     <!--<x:Double x:Key="ToggleSwitchOuterBorderStrokeThickness">1</x:Double>-->
-    <Thickness x:Key="ToggleSwitchOuterBorderStrokeThickness">1.5</Thickness>
+    <Thickness x:Key="ToggleSwitchOuterBorderStrokeThickness">1</Thickness>
     <StaticResource x:Key="ToggleSwitchContentForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
     <StaticResource x:Key="ToggleSwitchContentForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
     <StaticResource x:Key="ToggleSwitchHeaderForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />

src/Avalonia.Themes.Fluent/ToggleSwitch.xaml

@@ -13,11 +13,12 @@
         <TextBlock
           Text="Updates will be automaticly Downloaded and installed shile the computer is shutting down or restarting"
           TextWrapping="Wrap"/>
-        <ToggleSwitch 
+        <ToggleSwitch HorizontalContentAlignment="Left"
           Content="Enable automatic Updates?" 
           OffContent="Uit" 
           OnContent="Aan"
-          VerticalAlignment="Bottom" />
+          VerticalAlignment="Bottom"
+      />
       </StackPanel>
 
       <StackPanel Spacing="12">
@@ -28,7 +29,7 @@
           Text="The previewer Shows a preview off your code, this could slow down your system"
           TextWrapping="Wrap"/>
         <ToggleSwitch 
-          OnContent="Yes" OffContent="No"
+          
           Content="Previewer" 
           IsChecked="True"
         />
@@ -100,15 +101,15 @@
                  <Border x:Name="OuterBorder"
                    Grid.Row="1"
                    Height="20"
-                   Width="42" 
-                   CornerRadius="10"
+                   Width="40" 
+                   CornerRadius="100"
                    BorderThickness="{DynamicResource ToggleSwitchOuterBorderStrokeThickness}" />
                           
                  <Border x:Name="SwitchKnobBounds"
                    Grid.Row="1"
                    Height="20"
-                   Width="42"
-                   CornerRadius="10"
+                   Width="40"
+                   CornerRadius="100"
                    BorderThickness="{DynamicResource ToggleSwitchOnStrokeThickness}"/>
                           
                  <Canvas x:Name="SwitchKnob" 
@@ -335,7 +336,7 @@
     <x:Double x:Key="ToggleSwitchPreContentMargin">6</x:Double>
     <x:Double x:Key="ToggleSwitchPostContentMargin">6</x:Double>
     <x:Double x:Key="ToggleSwitchThemeMinWidth">154</x:Double>
-    <x:Double x:Key="KnobOnPosition">22</x:Double>
+    <x:Double x:Key="KnobOnPosition">20</x:Double>
     <x:Double x:Key="KnobOffPosition">0</x:Double>
  
  </Styles.Resources>