From cd06130b381cc0d4d6e0efc0e6c3df49329ccdc2 Mon Sep 17 00:00:00 2001
From: Shane32 <shane@acdmail.com>
Date: Tue, 7 May 2024 11:02:56 -0400
Subject: [PATCH] Add comment

---
 QRCoder/QRCodeGenerator.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/QRCoder/QRCodeGenerator.cs b/QRCoder/QRCodeGenerator.cs
index b4eb63bc..e004a570 100644
--- a/QRCoder/QRCodeGenerator.cs
+++ b/QRCoder/QRCodeGenerator.cs
@@ -751,12 +751,13 @@ bool IsUtf8()
         /// </summary>
         private static bool IsValidISO(string input)
         {
+            // No heap allocations if the string is ISO-8859-1
             try
             {
                 _ = _iso88591ExceptionFallback.GetByteCount(input);
                 return true;
             }
-            catch (EncoderFallbackException)
+            catch (EncoderFallbackException) // The exception is a heap allocation and not ideal
             {
                 return false;
             }