Question

Here’s my rather clumsy solution:

   // Duplicate last element 
   { 
          List<PointF> t; 
          t = tiles.ToList(); 
          t.Add(tiles.LastOrDefault()); 
          tiles = t.ToArray(); 
   }

The strange fact that .Add does not return the list means one statement is forced to be four.

What’s a better e.g. more concise way? Thanks.

Answer 1

I’m finding your example difficult to follow… let me know if this makes sense.

var strings = new[] { "Item 1", "Item 2" };
strings = strings.Concat(new[] { strings.LastOrDefault() }).ToArray();

This example takes an array and duplicates the last item.

In your case it looks like tiles is an array of PointF. If you want to duplicate the last element all you have to do is:

tiles = tiles.Concat(new[] { tiles.LastOrDefault() }).ToArray();