Accessing a Dictionary.Keys Key through a numeric index

Question

I\'m using a Dictionary where the int is a count of the key.

Now, I need to access the last-inserted Key inside the Dict

Answer 1

One alternative would be a KeyedCollection if the key is embedded in the value.

Just create a basic implementation in a sealed class to use.

So to replace Dictionary (which isn't a very good example as there isn't a clear key for a int).

private sealed class IntDictionary : KeyedCollection
{
    protected override string GetKeyForItem(int item)
    {
        // The example works better when the value contains the key. It falls down a bit for a dictionary of ints.
        return item.ToString();
    }
}

KeyedCollection intCollection = new ClassThatContainsSealedImplementation.IntDictionary();

intCollection.Add(7);

int valueByIndex = intCollection[0];