Why does ConcurrentDictionary.TryRemove require a second out argument?

Question

I only want to remove a value.. I don\'t need to use the variable afterwards. Why not include an overload where this second parameter was not required?

Do I really h

Answer 1

C#7 added discard syntactic sugar

So now you can write:

dictionary.TryRemove(entry.Key, out _); 

Reference

We allow "discards" as out parameters as well, in the form of a _, to let you ignore out parameters you don’t care about:

p.GetCoordinates(out var x, out _); // I only care about x