From c928700febf564fcd8408d64dda61f838c4a09c9 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Thu, 14 May 2020 21:24:44 -0300
Subject: [PATCH] make copy of list before enumerating.

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

diff --git a/src/Avalonia.Controls/Window.cs b/src/Avalonia.Controls/Window.cs
index 4b6df20363..07e3d78650 100644
--- a/src/Avalonia.Controls/Window.cs
+++ b/src/Avalonia.Controls/Window.cs
@@ -376,7 +376,7 @@ namespace Avalonia.Controls
 
         private void CloseInternal ()
         {
-            foreach(var child in _children)
+            foreach(var child in _children.ToList())
             {
                 // if we HandleClosing() before then there will be no children.
                 child.CloseInternal();