I like to use FxCop when I’m coding and sometimes I get hit with the rule that says do not use List<T>, but it doesn’t say what to use instead or it’s not clear what to use instead. After some research I found some suggestions:

http://blogs.msdn.com/kcwalina/archive/2005/09/26/474010.aspx

http://blogs.msdn.com/fxcop/archive/2006/04/27/585476.aspx

That recommend using Collection<T> but neither of them bothers to mention where Collection<T> is. So I did a little more research and I discovered it here:

System.Collection.ObjectModel.Collection<T>