From 7f33ffaf8b6446e8ccca4c5b9f103b476f8e8960 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dariusz=20Komosi=C5=84ski?= <darek.komosinski@gmail.com>
Date: Wed, 11 Sep 2019 10:30:49 +0200
Subject: [PATCH] Avoid allocations when running UpdateIsEffectivelyEnabled.

---
 src/Avalonia.Input/InputElement.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Input/InputElement.cs b/src/Avalonia.Input/InputElement.cs
index 4b4ab177b8..5b9b2676c0 100644
--- a/src/Avalonia.Input/InputElement.cs
+++ b/src/Avalonia.Input/InputElement.cs
@@ -565,9 +565,13 @@ namespace Avalonia.Input
         {
             IsEffectivelyEnabled = IsEnabledCore && (parent?.IsEffectivelyEnabled ?? true);
 
-            foreach (var child in this.GetVisualChildren().OfType<InputElement>())
+            var children = VisualChildren;
+
+            for (int i = 0; i < children.Count; ++i)
             {
-                child.UpdateIsEffectivelyEnabled(this);
+                var child = children[i] as InputElement;
+
+                child?.UpdateIsEffectivelyEnabled(this);
             }
         }
     }