Question

Its late so this may be a dumb question…
If Fish is a class (with no Equal/operator== overrides/overloads) and I want to get a specific fish matched on reference equality from a List or ObservableCollection of Fish(es) currently I do:

Fish found_fish1 = my_list.Find(f => f==search_fish);
Fish found_fish2 = my_observable_collection.FirstOrDefault(f => f==search_fish);

Is that the best way to do this? I was expecting an XXXX method that takes a Fish (similar to Remove) eg

Fish found_fish = my_observable_collection.XXXX(search_fish);

but just can’t seem to find it.

Answer 1

Since found_fish is either search_fish or null, you can use ICollection<T>.Contains:

Fish found_fish1 =
    my_list.Contains(search_fish) ? search_fish : null;
Fish found_fish2 =
    my_observable_collection.Contains(search_fish) ? search_fish : null;