Simplified code.

Author: dlemstra

src/Magick.NET/ImageOptimizers/ImageOptimizer.cs

@@ -1,9 +1,9 @@
 // Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
 // Licensed under the Apache License, Version 2.0.
 
-using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.IO;
+using System.Linq;
 using ImageMagick.ImageOptimizers;
 
 namespace ImageMagick;
@@ -27,21 +27,6 @@ public sealed class ImageOptimizer
     /// </summary>
     public bool OptimalCompression { get; set; }
 
-    private string SupportedFormats
-    {
-        get
-        {
-            var formats = new List<string>(_optimizers.Count);
-
-            foreach (var optimizer in _optimizers)
-            {
-                formats.Add(optimizer.Format.ModuleFormat.ToString());
-            }
-
-            return string.Join(", ", formats.ToArray());
-        }
-    }
-
     /// <summary>
     /// Performs compression on the specified file. With some formats the image will be decoded
     /// and encoded and this will result in a small quality reduction. If the new file size is not
@@ -241,6 +226,7 @@ private bool DoCompress(FileInfo file)
         if (IgnoreUnsupportedFormats)
             return null;
 
-        throw new MagickCorruptImageErrorException("Invalid format, supported formats are: " + SupportedFormats);
+        var supportedFormats = string.Join(", ", _optimizers.Select(imageOptizimer => imageOptizimer.Format.ModuleFormat.ToString()));
+        throw new MagickCorruptImageErrorException($"Invalid format, supported formats are: {supportedFormats}");
     }
 }