From 8238da223adc3c0829ed6d2cf8f83a8cbab72d3c Mon Sep 17 00:00:00 2001
From: Paddy Xu <xupaddy@gmail.com>
Date: Wed, 24 May 2017 00:18:15 +0300
Subject: [PATCH] Fix a error msg upon closing Excel preview window

---
 .../PreviewPanel.xaml.cs                              | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/QuickLook.Plugin/QuickLook.Plugin.IPreviewHandlers/PreviewPanel.xaml.cs b/QuickLook.Plugin/QuickLook.Plugin.IPreviewHandlers/PreviewPanel.xaml.cs
index 4c5611d..48fbdc2 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.IPreviewHandlers/PreviewPanel.xaml.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.IPreviewHandlers/PreviewPanel.xaml.cs
@@ -20,11 +20,14 @@ namespace QuickLook.Plugin.IPreviewHandlers
 
         public void Dispose()
         {
-            presenter.Child = null;
-            presenter?.Dispose();
+            Dispatcher.CurrentDispatcher.BeginInvoke(new Action(() =>
+            {
+                presenter.Child = null;
+                presenter?.Dispose();
 
-            _control?.Dispose();
-            _control = null;
+                _control?.Dispose();
+                _control = null;
+            }));
         }
 
         public void PreviewFile(string file, ContextObject context)