[Mono-list] Some more class library compliance issues

[Miguel de Icaza]

> Does it really matter that, for example, ArrayList.FixedSize() returns
> ArrayList and not Ilist (since ArrayList is derived from Ilist)? Code
> that compiles with CSC should compile on MCS, but not necessarily
> visa-versa.

Yes, we should consider this as a bug.  We should have the same return
types for everything.

Thanks for putting this list together Piers.  I wonder if Duncan did get
around fixing that?

Miguel