From 7ae9e86e1d9e21711c8a7f169a006f3919dc4a0c Mon Sep 17 00:00:00 2001
From: Austin Noska <austin.noska@profound-tech.com>
Date: Mon, 7 Jun 2021 14:43:53 -0400
Subject: [PATCH] fix: Fixed an issue where the SequenceComparer & the
 UndefinedVersionComparer were not handling null values properly

---
 ICD.Common.Utils/Comparers/SequenceComparer.cs         | 7 ++++---
 ICD.Common.Utils/Comparers/UndefinedVersionComparer.cs | 7 +++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/ICD.Common.Utils/Comparers/SequenceComparer.cs b/ICD.Common.Utils/Comparers/SequenceComparer.cs
index aac843a..d402d63 100644
--- a/ICD.Common.Utils/Comparers/SequenceComparer.cs
+++ b/ICD.Common.Utils/Comparers/SequenceComparer.cs
@@ -29,11 +29,12 @@ namespace ICD.Common.Utils.Comparers
 
 		public int Compare(IEnumerable<T> x, IEnumerable<T> y)
 		{
+			if (x == null && y == null)
+				return 0;
 			if (x == null)
-				throw new ArgumentNullException("x");
-
+				return -1;
 			if (y == null)
-				throw new ArgumentNullException("y");
+				return 1;
 
 			using (IEnumerator<T> firstPos = x.GetEnumerator())
 			{
diff --git a/ICD.Common.Utils/Comparers/UndefinedVersionComparer.cs b/ICD.Common.Utils/Comparers/UndefinedVersionComparer.cs
index 1476d51..e00b0a1 100644
--- a/ICD.Common.Utils/Comparers/UndefinedVersionComparer.cs
+++ b/ICD.Common.Utils/Comparers/UndefinedVersionComparer.cs
@@ -19,6 +19,13 @@ namespace ICD.Common.Utils.Comparers
 
 		public int Compare(Version x, Version y)
 		{
+			if (x == null && y == null)
+				return 0;
+			if (x == null)
+				return -1;
+			if (y == null)
+				return 1;
+
 			return x.ClearUndefined()
 			        .CompareTo(y.ClearUndefined());
 		}