From 1aa44984b72a2104e51cf69aa58622b6de6d814e Mon Sep 17 00:00:00 2001
From: ShadowMarker789 <37165910+ShadowMarker789@users.noreply.github.com>
Date: Sat, 1 Oct 2022 13:17:14 +0800
Subject: [PATCH] Fix for Issue 9064 - Dispatcher call instead

https://github.com/AvaloniaUI/Avalonia/issues/9064

Fix for throwing unhandled exception in screen page, replace direct invalidate visual with dispatcher invocation of invalidate visual
---
 samples/ControlCatalog/Pages/ScreenPage.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/samples/ControlCatalog/Pages/ScreenPage.cs b/samples/ControlCatalog/Pages/ScreenPage.cs
index dde622d585..e0627eca1c 100644
--- a/samples/ControlCatalog/Pages/ScreenPage.cs
+++ b/samples/ControlCatalog/Pages/ScreenPage.cs
@@ -6,6 +6,7 @@ using Avalonia.Markup.Xaml;
 using Avalonia.Media;
 using Avalonia.Platform;
 using Avalonia.Rendering;
+using Avalonia.Threading;
 
 namespace ControlCatalog.Pages
 {
@@ -40,7 +41,7 @@ namespace ControlCatalog.Pages
                     if (screen.Bounds.X / 10f < _leftMost)
                     {
                         _leftMost = screen.Bounds.X / 10f;
-                        InvalidateVisual();
+                        Dispatcher.UIThread.Post(InvalidateVisual, DispatcherPriority.Background);
                         return;
                     }