TASSOGRAPHY

public void CopyMetadata(string sourceFile, string destinationFile)
{
   BitmapCreateOptions createOptions = BitmapCreateOptions.PreservePixelFormat | BitmapCreateOptions.IgnoreColorProfile;

   // Create backup of the file so you can read and write to different files
   string tempFile = destinationFile + ".tmp";
   File.Copy(destinationFile, tempFile, true);

   // Open the source file
   using (Stream sourceStream = File.Open(sourceFile, FileMode.Open, FileAccess.Read))
   {
      BitmapDecoder sourceDecoder = BitmapDecoder.Create(sourceStream, createOptions, BitmapCacheOption.None);

      // Check source is has valid frames
      if (sourceDecoder.Frames[0] != null && sourceDecoder.Frames[0].Metadata != null)
      {
         // Get a clone copy of the metadata
         BitmapMetadata sourceMetadata = sourceDecoder.Frames[0].Metadata.Clone() as BitmapMetadata;

         // Open the temp file
         using (Stream tempStream = File.Open(tempFile, FileMode.Open, FileAccess.Read))
         {
            BitmapDecoder tempDecoder = BitmapDecoder.Create(tempStream, createOptions, BitmapCacheOption.None);

            // Check temp file has valid frames
            if (tempDecoder.Frames[0] != null && tempDecoder.Frames[0].Metadata != null)
            {
               // Open the destination file
               using (Stream destinationStream = File.Open(destinationFile, FileMode.Open, FileAccess.ReadWrite))
               {
                  // Create a new jpeg frame, replacing the destination metadata with the source
                  BitmapFrame destinationFrame = BitmapFrame.Create(tempDecoder.Frames[0],
                        tempDecoder.Frames[0].Thumbnail,
                        sourceMetadata,
                        tempDecoder.Frames[0].ColorContexts);

                  // Save the file
                  JpegBitmapEncoder destinationEncoder = new JpegBitmapEncoder();
                  destinationEncoder.Frames.Add(destinationFrame);
                  destinationEncoder.Save(destinationStream);
               }
            }
         }
      }
   }

   // Delete the temp file
   File.Delete(tempFile);
}