You can do this with the compare method:
I am not sure if Metric.Undefined works, you might have to experiment a bit with the different Metric values.
using (MagickImage bagFrame1 = new MagickImage("bag_frame1.gif")) { MagickImage compare = new MagickImage(); MagickImage bagFrame2 = new MagickImage("bag_frame2.gif"); bagFrame1.Compare(bagFrame2, Metric.Undefined, compare); compare.Write("compare.gif"); }