Create An Array Of References To Doubles?

I have a bunch of type Double variables in my program, say for example

Dim Area as Double = 0
Dim Perimeter as Double = 0

Somewhere in my program I want to calculate these values, so I define

Public Sub TheSquare(ByRef TheArea as Double, ByRef ThePerim as Double, ByVal TheSide as Double)
TheArea = TheSide^2
ThePerim = 4 * TheSide
End Sub

and somewhere in the program I'm collecting side lengths and calculating the area and perimeter; say

While True
S = GetSideValueFromSomewhere()
TheSquare(Area, Perimeter, S)
End

In my real program, I have, say, 20 quantities that I want to calculate. Obviously each one has a different equation. But in the end I want to output all 20 to a file, so to save typing, I create an array of the quantities, like this:

Dim TypingSaver() as Double = {Area, Perimeter}

so that I can dump values to file with a three-line for-loop instead of copying and pasting 20 variable names.

This does exactly what I want if Area and Perimeter were reference types like Objects. But since they are Doubles, TypingSaver contains only their values, not references to the actual variables. So after I use my TheSquare function the values of Area and Perimeter are correctly updated but TypingSaver just constains whatever the values of Area and Perimeter were when I declared the array.

how can I create an array of references to doubles in VB.NET?