From 6b902254bcc0c251d0c2255da2c1520ec04b63a5 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Wed, 26 Feb 2020 17:52:06 +0100
Subject: [PATCH] Refactored styling.

- Don't use Rx in the styling system. Instead introduces `IStyleActivator` which is like an `IObservable<bool>`-lite in order to cut down on allocations.
- #nullable enable on touched files
---
 src/Avalonia.Styling/StyledElement.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Styling/StyledElement.cs b/src/Avalonia.Styling/StyledElement.cs
index 6b020dd1c0..0bd01d2634 100644
--- a/src/Avalonia.Styling/StyledElement.cs
+++ b/src/Avalonia.Styling/StyledElement.cs
@@ -207,9 +207,9 @@ namespace Avalonia
         /// </remarks>
         public Styles Styles
         {
-            get
+            get 
             {
-                if (_styles == null)
+                if (_styles is null)
                 {
                     _styles = new Styles(this);
                     _styles.ResourcesChanged += ThisResourcesChanged;