StateContainer(ViewState)]

string FirstName
{
get;
set;
}

[StateContainer(Session)]
List<string> myList
{
get;set;
}

[StateContainer(Cache)]
List<string> myList2
{
get;set;
}

Just a random thought: I think it would be nice, with the help of an attribute, to be able to define where a given property would be stored.

I guess it also be applied at the class level, if you want all of your properties to inherti the same StateContainer Attribute.

A change probably best fit for an upcoming Framework release.

Just a thought.