Use constant

Author: drewnoakes

MetadataExtractor/Formats/Iptc/IptcReader.cs

@@ -35,7 +35,7 @@ public sealed class IptcReader : IJpegSegmentMetadataReader
         public static final int POST_DATA_RECORD = 9;
         */
 
-        private const byte IptcMarkerByte = 0x1c;
+        internal const byte IptcMarkerByte = 0x1c;
 
         ICollection<JpegSegmentType> IJpegSegmentMetadataReader.SegmentTypes { get; } = new[] { JpegSegmentType.AppD };
 

MetadataExtractor/Formats/Png/PngMetadataReader.cs

@@ -414,13 +414,14 @@ IEnumerable<Directory> ProcessTextChunk(string keyword, byte[] textBytes)
                         // this is unfortunate, but the "IPTC" profile may be stored as either
                         // IPTC IIM or a Photoshop IRB resource, so we must test for this.
                         // Check if the first byte matches IptcReader.IptcMarkerByte (0x1c)
-                        if (byteCount > 0 && textBytes[0] == 0x1c)
+                        if (byteCount > 0 && textBytes[0] == IptcReader.IptcMarkerByte)
+                        {
                             yield return new IptcReader().Extract(new SequentialByteArrayReader(textBytes), byteCount);
+                        }
                         else
                         {
                             foreach (var psDirectory in new Photoshop.PhotoshopReader().Extract(new SequentialByteArrayReader(textBytes), byteCount))
                                 yield return psDirectory;
-
                         }
                     }
                     else