Null parameter checking in C#

Question

In C#, are there any good reasons (other than a better error message) for adding parameter null checks to every function where null is not a valid value? Obviously, the code tha

Answer 1

I've been using this for a year now:

_ = s ?? throw new ArgumentNullException(nameof(s));

It's a oneliner, and the discard (_) means there's no unnecessary allocation.