From de7c5456b5866cc4c35bf0a9b2d2e1b00bda2403 Mon Sep 17 00:00:00 2001
From: Dominik Matijaca <mat1jaczyyy@gmail.com>
Date: Thu, 15 Jul 2021 05:43:15 +0200
Subject: [PATCH] Use as instead of is with variable

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

diff --git a/src/Avalonia.Controls/TopLevel.cs b/src/Avalonia.Controls/TopLevel.cs
index fcdb80a7f7..1f76cb247c 100644
--- a/src/Avalonia.Controls/TopLevel.cs
+++ b/src/Avalonia.Controls/TopLevel.cs
@@ -286,7 +286,7 @@ namespace Avalonia.Controls
         IMouseDevice IInputRoot.MouseDevice => PlatformImpl?.MouseDevice;
 
         /// <inheritdoc/>
-        bool? IInputRoot.IsPlatformEnabled => PlatformImpl is IWindowImpl windowImpl? windowImpl.IsEnabled : (bool?)null;
+        bool? IInputRoot.IsPlatformEnabled => (PlatformImpl as IWindowImpl)?.IsEnabled;
 
         void IWeakSubscriber<ResourcesChangedEventArgs>.OnEvent(object sender, ResourcesChangedEventArgs e)
         {