From 97ab9678f304a36848487b79e506bb417f561d86 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Karger=20=E3=83=84=20=E2=98=80?=
 <punkerat76@gmail.com>
Date: Fri, 8 Oct 2021 21:50:51 +0200
Subject: [PATCH] Merge pull request #409 from jizc/fix/multiselection

Fixes ListBox multi selection & reduces amount of SelectionChanged events
---
 .../Utilities/ItemsControlExtensions.cs                    | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/GongSolutions.WPF.DragDrop/Utilities/ItemsControlExtensions.cs b/src/GongSolutions.WPF.DragDrop/Utilities/ItemsControlExtensions.cs
index d31253b2..bce7e498 100644
--- a/src/GongSolutions.WPF.DragDrop/Utilities/ItemsControlExtensions.cs
+++ b/src/GongSolutions.WPF.DragDrop/Utilities/ItemsControlExtensions.cs
@@ -340,12 +340,7 @@ public static void SetSelectedItem(this ItemsControl itemsControl, object item2S
 
                 if (selectionMode != SelectionMode.Single)
                 {
-                    var itemsToDeselect = listBox.SelectedItems.Cast<object>().Where(si => si != item2Select).ToArray();
-
-                    foreach (var item in itemsToDeselect)
-                    {
-                        listBox.SelectedItems.Remove(item);
-                    }
+                    listBox.UnselectAll();
                 }
 
                 try