From 6d5d2979ce680148a0e2135fadfa1d1b19b6ab89 Mon Sep 17 00:00:00 2001
From: Color_yr <402067010@qq.com>
Date: Sun, 3 Nov 2024 20:49:29 +0800
Subject: [PATCH] fix Expander.cs (#17411)

---
 src/Avalonia.Controls/Expander.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/Expander.cs b/src/Avalonia.Controls/Expander.cs
index 668de5bca9..4f0070dbe7 100644
--- a/src/Avalonia.Controls/Expander.cs
+++ b/src/Avalonia.Controls/Expander.cs
@@ -232,7 +232,7 @@ namespace Avalonia.Controls
                 }
                 else
                 {
-                    await ContentTransition.Start(visualContent, null, forward, _lastTransitionCts.Token);
+                    await ContentTransition.Start(visualContent, null, !forward, _lastTransitionCts.Token);
                 }
             }