From c9b931187ba21c472d281e44434f9dce7a76bdeb Mon Sep 17 00:00:00 2001
From: Claire Novotny <claire@novotny.org>
Date: Fri, 19 Feb 2021 08:05:48 -0500
Subject: [PATCH] Fix warnings about null checks

---
 .../WindowsDesktop/GraphicsTelemetryInitializer.cs            | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/AppInsights.WindowsDesktop/WindowsDesktop/GraphicsTelemetryInitializer.cs b/AppInsights.WindowsDesktop/WindowsDesktop/GraphicsTelemetryInitializer.cs
index 50752ec..6abd5c3 100644
--- a/AppInsights.WindowsDesktop/WindowsDesktop/GraphicsTelemetryInitializer.cs
+++ b/AppInsights.WindowsDesktop/WindowsDesktop/GraphicsTelemetryInitializer.cs
@@ -90,8 +90,8 @@ private static double GetFeatureLevel()
                 out deviceOut,
                 out featureLevelRef,
                 out immediateContextOut);
-            if (deviceOut != null) Marshal.Release(deviceOut);
-            if (immediateContextOut != null) Marshal.Release(immediateContextOut);
+            if (deviceOut != IntPtr.Zero) Marshal.Release(deviceOut);
+            if (immediateContextOut != IntPtr.Zero) Marshal.Release(immediateContextOut);
             if (featureLevelRef <= D3D_FEATURE_LEVEL_9_1) return 9.1;
             if (featureLevelRef <= D3D_FEATURE_LEVEL_9_2) return 9.2;
             if (featureLevelRef <= D3D_FEATURE_LEVEL_9_3) return 9.3;