Add non-generic overload. Fix #1995

src/ImageSharp/Metadata/Profiles/Exif/ExifProfile.cs

@@ -121,6 +121,14 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
             }
         }
 
+        /// <summary>
+        /// Returns the thumbnail in the EXIF profile when available.
+        /// </summary>
+        /// <returns>
+        /// The <see cref="Image"/>.
+        /// </returns>
+        public Image CreateThumbnail() => this.CreateThumbnail<Rgba32>();
+
         /// <summary>
         /// Returns the thumbnail in the EXIF profile when available.
         /// </summary>

tests/ImageSharp.Tests/Metadata/Profiles/Exif/ExifProfileTests.cs

@@ -354,10 +354,15 @@ namespace SixLabors.ImageSharp.Tests.Metadata.Profiles.Exif
 
             TestProfile(profile);
 
-            using Image<Rgba32> thumbnail = profile.CreateThumbnail<Rgba32>();
+            using Image thumbnail = profile.CreateThumbnail();
             Assert.NotNull(thumbnail);
             Assert.Equal(256, thumbnail.Width);
             Assert.Equal(170, thumbnail.Height);
+
+            using Image<Rgba32> genericThumbnail = profile.CreateThumbnail<Rgba32>();
+            Assert.NotNull(genericThumbnail);
+            Assert.Equal(256, genericThumbnail.Width);
+            Assert.Equal(170, genericThumbnail.Height);
         }
 
         [Fact]