Arrays- Sorting and initialization

Howdy people,

.Net Arrays are slightly confusing to me and these two issues came up.

1) I have a 2 dimensional array of integers representing 2D coordinates (X,Y) what would be the best way to sort it by ascending Y value considering I need the corresponding X values of the Y to follow.
Maybe splitting it into two arrays to use the array.sort() function ?


2) Initialization of an empty array causes issues (=Nothing) when used further in the code.
I made a messy workaround but I'm hoping someone could suggest me a better alternative.