class instance

hello experts

i wanted to set the instance of this customerdetailclass based on learnit value
i tried the following and am getting errors

 If learnIt Then
    Dim ContactDetails As New CustomerDetailsClass(ContactTitle, txtContactFirstName.Text,,,,,,)
 else
    Dim ContactDetails As New CustomerDetailsClass(ContactTitle, txtContactFirstName.Text,,,,,,)
 end if

 Can I not use like this?

 Dim ContactDetails As New CustomerDetailsClass
 if learnt then
  ContactDetails = ContactDetails(ContactTitle, txtContactFirstName.Text,,,,)
 else
  ContactDetails = ContactDetails(ContactTitle, txtContactFirstName.Text,,,,)
end if

please advise
thanks