Picking an Image out of a MagIckImageCollection

[whugemann]

I am working on a montage project, where the user provides an arbitrary list of image files as command line parameters to a console app, which arranges the images in m x n tiles, extending the list by a blurred version of the last image if needed. My attempt so far is something like

   using var blurImg = (imgList[imgList.Count - 1]).Clone;
   blurImg.Resize(new MagickGeometry("5%"));
   blurImg.Resize(new MagickGeometry("2000%"));
   for (int i = nImg; i < nm; i++)
   {
      imgList.Add(blurImg.Clone);
   }

but already the first line of this code is rejected by the compiler complaining that the delegate type cannot be derived. I guess that there is something essentially wrong with the way I address the last image in the list, but I couldn't find much examples working with image list, especially no example that picks a picture from a list.
If I try
using var blurImg = imgList.Last().Clone;
I run into the same problem.
So what's wrong over here?

[dlemstra]

You are missing () for the Clone method. It should be Clone() instead.

[whugemann]

Small detail, big effect!
using var blurImg = imgList.Last().Clone();
does a perfect job, is now obvious and meets my expectations how it should work.

[whugemann]

It's a little bit off topic over here, but staying with the example:
It seems to be impossible to cascade operations along the lines of

using var blurImg = (imgList[imgList.Count - 1]).Clone;
blurImg.Resize(new MagickGeometry("5%")).Resize(new MagickGeometry("2000%"));

or even
using var blurImg = (imgList[imgList.Count - 1]).Clone.Resize(new MagickGeometry("5%")).Resize(new MagickGeometry("2000%"));
This would of course not be more efficient, but closer to the parameter handling by the command line tool magick.exe.
This behaviour seems to originate from C# (?).
(I read about 'CloneAndMutate', but I can live with my more inefficient approach; the image is not that large.)

[dlemstra]

You could do:

using var blurImg = (imgList[imgList.Count - 1]).CloneAndMutate(image => image.Resize(new MagickGeometry("5%")));
blurImg.Resize(new MagickGeometry("2000%"));

But that's probably just a small optimization. The 2000% is probably what is taking most of the time and memory.