int.TryParse does not return an out value [Answered]

Hello my friends

I know you do not like screen, but it feel like it need one here, so the code is the screen.

I am trying to check if the textBox actual have a number input, and if yes to put the value into a variable.
Sadly, the if return true (so the int.TryParse work) but the variable is still the same value and does not have the new one.
How to make this work ?
Thank you