public static void KeysAndValuesAsDelegate()
{
IDictionary <string, int> dict = new Dictionary <string, int>()
{
{ "one", 1 },
{ "two", 2 }
};
Equal(new HashSet <string>(new[] { "one", "two" }), Enumerable.ToHashSet(dict.KeysGetter().Invoke()));
Equal(new HashSet <int>(new[] { 1, 2 }), Enumerable.ToHashSet(dict.ValuesGetter().Invoke()));
}