How can I define a variable in XAML?

Question

I have the following two buttons in XAML:

Answer 1

Try this:

add to the head of the xamlfile

xmlns:System="clr-namespace:System;assembly=mscorlib"

Then Add this to the resource section:

2.35

Lastly, use a thickness on the margin:

A lot of system types can be defined this way: int, char, string, DateTime, etc

Note: You're right... Had to do some better testing.. changed to code so that it should work