public void Dictionary_Generic_KeyCollection_GetEnumerator(int count)
        {
            var dictionary = new OptimizedBTree <string, string>();
            var seed       = 13453;

            while (dictionary.Count < count)
            {
                dictionary.Add(CreateT(seed++), CreateT(seed++));
            }
            dictionary.Keys.GetEnumerator();
        }
        protected override ICollection <string> GenericICollectionFactory(int count)
        {
            var list = new OptimizedBTree <string, string>();
            var seed = 13453;

            for (var i = 0; i < count; i++)
            {
                list.Add(CreateT(seed++), CreateT(seed++));
            }
            return(list.Keys);
        }