how to create a array from a new instance of a class

Experts, i am trying to create an array object from a class, but i get an error arrays cannot be declared as new.  When i try to run i get instance not set to an instance of an object.  Any ideas?  Can someone provide me with an example?

In my form code
dim ipa as new ipdata  

ipa.ID_HEAD(0).Supplier_IP = "13.15.23.18"   'not set to instance of an object

I shorten up the class a lot, but there are a lot more variables.

Partial Public Class IPDATA
    Private ip_HEADERField() As Header_Info    
   Public Property ID_HEAD() As Header_Info()
        Get
            Return Me.ip_HEADERField       
      End Get
        Set
            Me.ip_HEADERField= value
        End Set
    End Property
End Class

Partial Public Class Header_Info    
    Private IP_ReferenceField As String
        
       Public Property Supplier_IP() As String
        Get
            Return Me.IP_ReferenceField         
       End Get
        Set
            Me.IP_ReferenceField  = value
        End Set
    End Property
    
   End Class

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