[DotNetDevelopment] storing object properties into an arraylist

[raddars]

Hi all,
Is it possible to loop through an object and put each element into an
array?

I have the following code breaks on the foreach because of
GetEnumerator not being a public definition.  Not sure how to correct
it or what that means!
Many thanks,

  try
        {
            XmlSerializer deserializer = new XmlSerializer(typeof
(Main));
            textReader = new StreamReader
(System.AppDomain.CurrentDomain.BaseDirectory + "test.xml", true);
            mainObj = (Main)deserializer.Deserialize
(textReader);
            foreach(object o in mainObj) {
                myArraylist.Add(o);
            }
        }