From de09f6e3b839e9ed35c6ea06954bf4c160403bc4 Mon Sep 17 00:00:00 2001
From: "Leaf Shi (BEYONDSOFT CONSULTING INC)" <v-leafshi@microsoft.com>
Date: Wed, 29 Jul 2026 23:46:12 -0700
Subject: [PATCH] Fix PictureBox frame callback handle race in OnFrameChanged

---
 .../System/Windows/Forms/Controls/PictureBox/PictureBox.cs      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/System.Windows.Forms/System/Windows/Forms/Controls/PictureBox/PictureBox.cs b/src/System.Windows.Forms/System/Windows/Forms/Controls/PictureBox/PictureBox.cs
index 976865fd5a8..f9dc5d41b99 100644
--- a/src/System.Windows.Forms/System/Windows/Forms/Controls/PictureBox/PictureBox.cs
+++ b/src/System.Windows.Forms/System/Windows/Forms/Controls/PictureBox/PictureBox.cs
@@ -1050,7 +1050,7 @@ private void OnFrameChanged(object? o, EventArgs e)
         }
 
         // Handle should be created, before calling the BeginInvoke.
-        if (InvokeRequired && IsHandleCreated)
+        if (IsHandleCreated && InvokeRequired)
         {
             lock (_internalSyncObject)
             {