How to load a type instance into an object array i.e. object[]

How to load a type into an object array.

 I have this.

 public partial class Message
    {

        private object[] itemsField;

        private decimal versionField;

        private bool versionFieldSpecified;

        public Message()
        {
            this.versionField = ((decimal)(1.0m));
        }

        /// <remarks/>
        [System.Xml.Serialization.XmlElementAttribute("Mess", typeof(Mess))]
        [System.Xml.Serialization.XmlElementAttribute("Heartbeat", typeof(Heartbeat))]
        public object[] Items
        {
            get
            {
                return this.itemsField;
            }
            set
            {
                this.itemsField = value;
            }
        }

   I have the following code.

            Message OutBoundMessage = new Message();
         
            Alert Alert = new Alert();

            OutBoundMessage.Items =  ((Alert) Alert);   -----> This line does not work.

 
How can I load the alert class into the object array.

regards
scope_creep