From 3373849c2b2f33a1620b53faf5e206ebe3d9d17a Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Mon, 24 May 2021 14:06:30 +0100
Subject: [PATCH] force osx shadow invalidation on programatic resize.

---
 native/Avalonia.Native/src/OSX/window.mm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/native/Avalonia.Native/src/OSX/window.mm b/native/Avalonia.Native/src/OSX/window.mm
index eb63cbd9f9..95a638ad72 100644
--- a/native/Avalonia.Native/src/OSX/window.mm
+++ b/native/Avalonia.Native/src/OSX/window.mm
@@ -265,6 +265,11 @@ public:
             
             [Window setContentSize:NSSize{x, y}];
             
+            
+            // Forces the shadow to invalidate on resize.
+            [Window setContentView: nullptr];
+            [Window setContentView: StandardContainer];
+            
             return S_OK;
         }
     }