simple serialization question

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From: MSNEWS (pvalenzuela_at_prosatt.com)
Date: 11/02/04 

Date: Tue, 2 Nov 2004 11:58:02 -0800

Hello,

What would be the difference between these two serializable tags?
The first one doesnt seem to serialize an object when saving it to a state
server. The second one does but again, whats the difference?

<System.Xml.Serialization.XmlRootAttribute([Namespace]:="",
IsNullable:=False)> _

<Serializable()> _