int.TryParse = null if not numeric?

Question

is there some way of return null if it can\'t parse a string to int?

with:

public .... , string? categoryID) 
{
int.TryParse(categoryID, out categoryID);         


        

Answer 1

Simplest and one-liner...

int N = int.TryParse(somestring, out N) ? N : 0;

It works 'cause it's evaluated left to right. Null not so easy.