Question

I have a two dimensional array:

object[,] cells;

After initializing it, I want to insert a rectangular range in the middle.
Then to make room I need to shift a rectangular block down or right.
(As in you would do in Excel)

It seems this is not very easy with the above data structure.
Would a,

List < List < object > >

be easier to handle these kind of operations (there can be many such operations, so performance is really important)?

Answer 1

Yes, use a List < List < object > > if you need to remove/insert items. Arrays cannot be re-sized and so it will not be possible to achieve what you want using arrays.