In order to decrease the consumed memory and increase the overall performance of Sitefinity, several properties (in-memory collections) of given classes were replaced with extension methods that return the same data via IQueryable collections. See this page
from the documentation.
One of these was the Album class. So Images is now an extension method of Album as shown here
So your code needs to change just a bit:
var album = App.WorkWith().Albums().Where(a => a.Title == albumName).Get().FirstOrDefault();
album.Images().Where(x => x.Status == ContentLifecycleStatus.Live && x.Visible).OrderBy(x => x.Ordinal).ToList();
Make sure to add this using statement:
This should get you back in business.
the Telerik team
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