New Post: How do I translate this to Magick.net?

I am sorry, I don't think you understood me correctly and I am not sure if the bug you found relates to my issue. Let me explain again

What i need to do is get the difference between two images. The following command does exactly what I need:

convert IMG1.png IMG2.png -compose ChangeMask -composite OUTPUT.png 

Now I am trying to accomplish that in Magick.NET, but I fail.

I tried the code You proposed, but in OUTPUT.png I get exactly the same content of IMG1.png

IMG=New MagickImage("IMG1.png")

Mask=New MagickImage("IMG2.png")

IMG.Composite(Mask, Gravity.Center, CompositeOperator.ChangeMask)

IMG.Write("OUTPUT.png")

So, I am not sure if I am doing correctly the translation from the Imagemagick command to Magick.NET