Difference between elements of an ArrayList

I tell you that I have a ArrayList as follows:

Dim matriz As New ArrayList


matriz.Add(5)
matriz.Add(2)
matriz.Add(4)

matriz.Sort 

Now what I need is to know what the difference between elements is; that is

Elemento1 = 5
Elemento2 = 2 
Elemento3 = 4 

I want to know if there is any form or property of Array that will help me achieve this:

Pseudocode

Diferencia1 = ValorAbsoluto(Elemento1 - Elemento2)
Diferencia2 = ValorAbsoluto(Elemento1 - Elemento3)
Diferencia3 = ValorAbsoluto(Elemento2 - Elemento3)