http://developers.de/blogs/damir_dobric/archive/2008/02/22/serialization-of-nested-collections.aspxWhile serializing of your type you may get following exception: " Unable to generate a temporary class (result=1). error CS0136: A local variable named 'e' cannot be declared in this scope because it would give a different meaning to 'e'enCommunityServer 2008 SP1 (Build: 30619.63)