It would be better to post your requirements in terms of updating,
searching, random access, etc., so responders could match the strengths of
the various collection types to your needs.

As we don't know your requirements, the links below will help you decide.

http://msdn2.microsoft.com/en-us/library/system.collections.arraylist_members.aspx

http://msdn2.microsoft.com/en-us/library/6sh2ey19.aspx

Looks like you got answers in the C# newsgroup. Please don't
multipost.

The only reason I see for using ArrayList instead of List<something>
in .NET 2.0 is if you have to interact with older libraries that don't
support generics.

Mattias