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I try to read the PropertyItems of an jpeg image which contains a lot of properties.
I allways get "0" as a result of the following code.
// parametres exif
Image img = new Bitmap(fichierOri);
PropertyItem propItems = img.PropertyItems;
la_message.StringValue += ("\n*** " + propItems.Length.ToString ());
We don't have 100% coverage for System.Drawing in Mono. A couple options for alternatives would be https://github.com/mono/sysdrawing-coregraphics for a version of System.Drawing implemented with CoreGraphics under the hood, or else using NSImage/CGImage and apple's APIs to get the information.