From 7b670d674f53d58d0f2ddcb223da945354735d5f Mon Sep 17 00:00:00 2001
From: Nicolas <nrobert@users.noreply.github.com>
Date: Fri, 4 Oct 2019 15:19:59 +0200
Subject: [PATCH] Fix encoding when filename extension is upper case

---
 ImageFunctions/Thumbnail.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ImageFunctions/Thumbnail.cs b/ImageFunctions/Thumbnail.cs
index 7a0574d..71d2de4 100644
--- a/ImageFunctions/Thumbnail.cs
+++ b/ImageFunctions/Thumbnail.cs
@@ -43,7 +43,7 @@ private static IImageEncoder GetEncoder(string extension)
         {
             IImageEncoder encoder = null;
 
-            extension = extension.Replace(".", "");
+            extension = extension.Replace(".", "").ToLowerInvariant();
 
             var isSupported = Regex.IsMatch(extension, "gif|png|jpe?g", RegexOptions.IgnoreCase);