From 09250ec9c4ed78a50fae2143e943bcba85edf0d6 Mon Sep 17 00:00:00 2001
From: Bill Henning <bill.henning@actiprosoftware.com>
Date: Fri, 18 Aug 2023 08:47:04 -0400
Subject: [PATCH] Updated ToggleSplitButton.IsChecked to bind TwoWay by
 default, same as ToggleButton.

---
 src/Avalonia.Controls/SplitButton/ToggleSplitButton.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Controls/SplitButton/ToggleSplitButton.cs b/src/Avalonia.Controls/SplitButton/ToggleSplitButton.cs
index ff8bd5dc0b..e6f0abcad0 100644
--- a/src/Avalonia.Controls/SplitButton/ToggleSplitButton.cs
+++ b/src/Avalonia.Controls/SplitButton/ToggleSplitButton.cs
@@ -2,6 +2,7 @@
 
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Primitives;
+using Avalonia.Data;
 using Avalonia.Interactivity;
 using Avalonia.Styling;
 
@@ -36,8 +37,8 @@ namespace Avalonia.Controls
         /// Defines the <see cref="IsChecked"/> property.
         /// </summary>
         public static readonly StyledProperty<bool> IsCheckedProperty =
-            AvaloniaProperty.Register<ToggleSplitButton, bool>(
-                nameof(IsChecked));
+            AvaloniaProperty.Register<ToggleSplitButton, bool>(nameof(IsChecked), false,
+                defaultBindingMode: BindingMode.TwoWay);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="ToggleSplitButton"/> class.