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

If you're not interested in the value that was removed, simply call IDictionary.Remove(key). It's shadowed, so you have to invoke it explicitly.

Example:

var dict = new ConcurrentDictionary();
dict.AddOrUpdate("mykey", (val) => "test", (val1, val2) => "test");
((IDictionary)dict).Remove("mykey");

The TryRemove(key, out value) method is there to give you feedback whether the operation made any change. Use the one that best suits your needs.