Well to make the array start at whatever size you want you only have to do this:
Field grid:TMyType[,]
thing.grid = new TMyType[n,n]
But of course if you want to change the size later you lost its data.
Field grid:TMyType[,]
thing.grid = new TMyType[n,n]
But of course if you want to change the size later you lost its data.