public void Can_be_disposed()
{
var cache = new MKCache <Item>();
var item = cache.GetOrCreate("1", () => new Item(), Expiration);
cache.Dispose();
// Dispose is not Clear.
Assert.Equal(1, cache.Count);
// Disposed cache cannot be used anymore.
Assert.Throws <ObjectDisposedException>(() =>
cache.GetOrCreate("1", () => new Item(), Expiration));
}
