From 84a52b85d4029f7014f3255036c3b0fa23c05edf Mon Sep 17 00:00:00 2001
From: Ben <bennybuerger@web.de>
Date: Tue, 1 Feb 2022 17:22:25 +0100
Subject: [PATCH] NullCheck for currentActiveContent

currentActiveContent can be null and will throw an exception
---
 source/Components/AvalonDock/Controls/DropTarget.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/source/Components/AvalonDock/Controls/DropTarget.cs b/source/Components/AvalonDock/Controls/DropTarget.cs
index c1c31ca3..9694c39d 100644
--- a/source/Components/AvalonDock/Controls/DropTarget.cs
+++ b/source/Components/AvalonDock/Controls/DropTarget.cs
@@ -121,7 +121,8 @@ public void Drop(LayoutFloatingWindow floatingWindow)
 				var fwAsDocument = floatingWindow as LayoutDocumentFloatingWindow;
 				this.Drop(fwAsDocument);
 			}
-
+			if (currentActiveContent == null)
+				return;
 			Dispatcher.BeginInvoke(new Action(() =>
 				{
 					currentActiveContent.IsSelected = false;
@@ -149,4 +150,4 @@ public void DragLeave()
 
 		#endregion Public Methods
 	}
-}
\ No newline at end of file
+}