From 293a40c456b2a7648823071c68c20c942e00cf69 Mon Sep 17 00:00:00 2001
From: philstopford <phil.stopford@gmail.com>
Date: Thu, 16 Feb 2023 12:03:25 -0600
Subject: [PATCH] Address null warnings

---
 CSharp/Clipper2Lib/Clipper.Engine.cs   | 6 +++++-
 CSharp/Clipper2Lib/Clipper.RectClip.cs | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CSharp/Clipper2Lib/Clipper.Engine.cs b/CSharp/Clipper2Lib/Clipper.Engine.cs
index 9855fa5e..5f2e847e 100644
--- a/CSharp/Clipper2Lib/Clipper.Engine.cs
+++ b/CSharp/Clipper2Lib/Clipper.Engine.cs
@@ -156,8 +156,12 @@ internal class OutRec
 
   internal struct HorzSegSorter : IComparer<HorzSegment>
   {
-    public int Compare(HorzSegment hs1, HorzSegment hs2)
+    public int Compare(HorzSegment? hs1, HorzSegment? hs2)
     {
+      if (hs1 == null || hs2 == null)
+      {
+        return 0;
+      }
       if (hs1.rightOp == null)
       {
         return hs2.rightOp == null ? 0 : 1;
diff --git a/CSharp/Clipper2Lib/Clipper.RectClip.cs b/CSharp/Clipper2Lib/Clipper.RectClip.cs
index 188fe897..ca2a9e06 100644
--- a/CSharp/Clipper2Lib/Clipper.RectClip.cs
+++ b/CSharp/Clipper2Lib/Clipper.RectClip.cs
@@ -7,6 +7,7 @@
 * License   :  http://www.boost.org/LICENSE_1_0.txt                            *
 *******************************************************************************/
 
+#nullable enable
 using System;
 using System.Collections.Generic;
 using System.Linq;