From 7a33cd4e825f70dbc1fb4cef7dabb63d98b1f009 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Mon, 2 Nov 2020 10:22:55 +0000
Subject: [PATCH] change syntax.

---
 src/Avalonia.Controls/TreeView.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/TreeView.cs b/src/Avalonia.Controls/TreeView.cs
index f020280496..09742412d9 100644
--- a/src/Avalonia.Controls/TreeView.cs
+++ b/src/Avalonia.Controls/TreeView.cs
@@ -382,7 +382,7 @@ namespace Avalonia.Controls
                         ItemContainerGenerator.Index.ContainerFromItem(_selectedItem) :
                         ItemContainerGenerator.ContainerFromIndex(0);
                     
-                    return (result is {}, result); // SelectedItem may not be in the treeview.
+                    return (result != null, result); // SelectedItem may not be in the treeview.
                 }
 
                 return (true, null);