From 97ae32c619c6707e74a55d55c7d64e305b57512a Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Thu, 14 May 2020 15:14:18 -0300
Subject: [PATCH] fix collection modified exception.

---
 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 1159fc4928..086615d7d9 100644
--- a/src/Avalonia.Controls/Window.cs
+++ b/src/Avalonia.Controls/Window.cs
@@ -399,7 +399,7 @@ namespace Avalonia.Controls
         {
             bool canClose = true;
 
-            foreach(var child in _children)
+            foreach(var child in _children.ToList())
             {
                 if(!child.HandleClosing())
                 {