How do I define field names in a LINQ Dynamic Select Statement?

[Christhemist]

I am creating dynamic select statement in a LINQ Query using the System.Linq.Dynamic reference.

However, I am having syntax issues with defining the field names I want selected from the query.

Code:

 Dim both = (From row1 In AddressListDatatable.AsEnumerable()
                    Join row2 In MatrixDatatable.AsEnumerable()
                On row1.Field(Of String)("Offercode") Equals row2.Field(Of String)("Code") Select row1, row2)
        Dim data = both.Select("new (row1.Account, row1.First, row1.OFFERCODE, row2.OFFER, row2.Expiration)")

The highlighted portion of the code is where I am having syntax issues. This is the error it is giving me " No property or field 'Account' exists in type 'DataRow' "