From e7039842f5c38900a4dd3253207b99b95465c010 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Thu, 1 Dec 2022 17:34:07 +0000
Subject: [PATCH] Show can be called multiple times but ignored.

---
 src/Avalonia.Controls/Window.cs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/Avalonia.Controls/Window.cs b/src/Avalonia.Controls/Window.cs
index 6b936e495c..729bbaa4b3 100644
--- a/src/Avalonia.Controls/Window.cs
+++ b/src/Avalonia.Controls/Window.cs
@@ -663,11 +663,6 @@ namespace Avalonia.Controls
             {
                 throw new InvalidOperationException("Cannot re-show a closed window.");
             }
-            
-            if (_shown)
-            {
-                throw new InvalidOperationException("The window is already being shown.");
-            }
         }
         
         private void EnsureParentStateBeforeShow(Window owner)
@@ -783,6 +778,11 @@ namespace Avalonia.Controls
                 }
                 
                 EnsureParentStateBeforeShow(owner);
+                
+                if (_shown)
+                {
+                    throw new InvalidOperationException("The window is already being shown.");
+                }
 
                 RaiseEvent(new RoutedEventArgs(WindowOpenedEvent));