From affa4aa6ff820ba1664b36b8437efb80540df4d1 Mon Sep 17 00:00:00 2001
From: Joshua Shearer <rychard@users.noreply.github.com>
Date: Fri, 5 Jun 2020 10:20:01 -0400
Subject: [PATCH] Don't attempt to access non-existent manifest resources

---
 ModAssistant/Classes/Themes.cs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/ModAssistant/Classes/Themes.cs b/ModAssistant/Classes/Themes.cs
index 5e83996..846b61c 100644
--- a/ModAssistant/Classes/Themes.cs
+++ b/ModAssistant/Classes/Themes.cs
@@ -433,9 +433,19 @@ namespace ModAssistant
 
         private static BitmapImage GetImageFromEmbeddedResources(string themeName, string imageName)
         {
+            var assembly = Assembly.GetExecutingAssembly();
+            var resourceNames = assembly.GetManifestResourceNames();
+            var desiredResourceName = $"ModAssistant.Themes.{themeName}.{imageName}.png";
+
+            // Don't attempt to access non-existent manifest resources
+            if (!resourceNames.Contains(desiredResourceName))
+            {
+                return null;
+            }
+
             try
             {
-                using (Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream($"ModAssistant.Themes.{themeName}.{imageName}.png"))
+                using (Stream stream = assembly.GetManifestResourceStream(desiredResourceName))
                 {
                     byte[] imageBytes = new byte[stream.Length];
                     stream.Read(imageBytes, 0, (int)stream.Length);