From 197a00d63661751671ffc875e055f62f40d0dda1 Mon Sep 17 00:00:00 2001
From: Ed Harvey <edharvey@optusnet.com.au>
Date: Sun, 18 Dec 2011 22:21:34 +1100
Subject: [PATCH] Shortcut node deselection processing if no nodes remain.

---
 SharpTreeView/SharpTreeView.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/SharpTreeView/SharpTreeView.cs b/SharpTreeView/SharpTreeView.cs
index 74467feba..dc230faed 100644
--- a/SharpTreeView/SharpTreeView.cs
+++ b/SharpTreeView/SharpTreeView.cs
@@ -135,11 +135,11 @@ namespace ICSharpCode.TreeView
 				this.ItemsSource = flattener;
 			}
 		}
-		
+
 		void flattener_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
 		{
-			// Deselect nodes that are being hidden
-			if (e.Action == NotifyCollectionChangedAction.Remove) {
+			// Deselect nodes that are being hidden, if any remain in the tree
+			if (e.Action == NotifyCollectionChangedAction.Remove && Items.Count > 0) {
 				List<SharpTreeNode> selectedOldItems = null;
 				foreach (SharpTreeNode node in e.OldItems) {
 					if (node.IsSelected) {