From 713d5522fe145595757e48aac486cb64804df35c Mon Sep 17 00:00:00 2001
From: Ben <bennybuerger@web.de>
Date: Thu, 31 Aug 2023 14:02:07 +0200
Subject: [PATCH] Added additional NullChecks in OnClosed
 LayoutAnchorableFloatingWindowControl.cs

https://github.com/Dirkster99/AvalonDock/issues/437
---
 .../Controls/LayoutAnchorableFloatingWindowControl.cs         | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source/Components/AvalonDock/Controls/LayoutAnchorableFloatingWindowControl.cs b/source/Components/AvalonDock/Controls/LayoutAnchorableFloatingWindowControl.cs
index b9d6e0a4..6f453c04 100644
--- a/source/Components/AvalonDock/Controls/LayoutAnchorableFloatingWindowControl.cs
+++ b/source/Components/AvalonDock/Controls/LayoutAnchorableFloatingWindowControl.cs
@@ -208,11 +208,11 @@ protected override void OnInitialized(EventArgs e)
 		/// <inheritdoc />
 		protected override void OnClosed(EventArgs e)
 		{
-			var root = Model.Root;
+			var root = Model?.Root;
 			if (root != null)
 			{
 				if (root is LayoutRoot layoutRoot) layoutRoot.Updated -= OnRootUpdated;
-				root.Manager.RemoveFloatingWindow(this);
+				root.Manager?.RemoveFloatingWindow(this);
 				root.CollectGarbage();
 			}
 			if (_overlayWindow != null)