From e3d38a633dc3426a2d6320dfe7cfff9529cb2b1f Mon Sep 17 00:00:00 2001
From: Oliver Booth <me@olivr.me>
Date: Sun, 27 Jun 2021 13:11:03 +0100
Subject: [PATCH] (#42) Validate count >=0

---
 X10D/src/CharExtensions/CharExtensions.cs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/X10D/src/CharExtensions/CharExtensions.cs b/X10D/src/CharExtensions/CharExtensions.cs
index dae9639..73c36f1 100644
--- a/X10D/src/CharExtensions/CharExtensions.cs
+++ b/X10D/src/CharExtensions/CharExtensions.cs
@@ -1,4 +1,6 @@
-namespace X10D
+using System;
+
+namespace X10D
 {
     /// <summary>
     ///     Extension methods for <see cref="char" />.
@@ -15,7 +17,12 @@
         /// </returns>
         public static string Repeat(this char value, int count)
         {
-            return new(value, count);
+            if (count < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(count), ExceptionMessages.CountMustBeGreaterThanOrEqualTo0);
+            }
+            
+            return new string(value, count);
         }
     }
 }