I\'m using the new MemoryCache in .Net 4, with a max cache size limit in MB (I\'ve tested it set between 10 and 200MB, on systems with between 1.75 and 8GB of memory). I don\'t
MemoryCache definately has some issues. It ate 160Mb of memory on my asp.net server, just changed to simple list and added some extra logic to get the same functionality.