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

How about this?

public int? ParseToNull(string categoryId)
{
    int id;
    return int.TryParse(categoryId, out id) ? (int?)id : null;
}