[Mono-list] arraylist.sort unstable ?

[andreas graeper]

i am learning collections / generics ..
and found an example defining a class Cmp that implements IComparer using
CaseInsensitiveComparer

ArrayList l = new ArrayList();
l.Add("a");
l.Add("A");

l.Sort(new Cmp()); lprint(l);
l.Sort(new CaseInsensitiveComparer()); lprint(l);

each time i sort with either of that comparers the order of "a","A" is
changed,
though the Compare("a","A") returns 0.

is this an error ?
using the same comparer class twice should return the same order ?!

thanks in advance
andreas
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