From 4828300076d72146203d8a76a519931e8f846b2d Mon Sep 17 00:00:00 2001
From: Oliver Booth <me@olivr.me>
Date: Sun, 27 Jun 2021 13:06:17 +0100
Subject: [PATCH] (#42) Validate not-null handle

---
 X10D/src/WaitHandleExtensions/WaitHandleExtensions.cs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/X10D/src/WaitHandleExtensions/WaitHandleExtensions.cs b/X10D/src/WaitHandleExtensions/WaitHandleExtensions.cs
index c075e31..97fbff1 100644
--- a/X10D/src/WaitHandleExtensions/WaitHandleExtensions.cs
+++ b/X10D/src/WaitHandleExtensions/WaitHandleExtensions.cs
@@ -1,4 +1,5 @@
-using System.Threading;
+using System;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace X10D
@@ -15,7 +16,12 @@ namespace X10D
         /// <returns>A task which encapsulates <see cref="WaitHandle.WaitOne()" />.</returns>
         public static Task WaitOneAsync(this WaitHandle handle)
         {
-            return new(() => handle.WaitOne());
+            if (handle is null)
+            {
+                throw new ArgumentNullException(nameof(handle));
+            }
+
+            return new Task(() => handle.WaitOne());
         }
     }
 }