I'm trying to concatenate product_name with product_prize_kg by using LINQ so I can display it as one field in a dropdownlist. When I try to do this I get the following error.

value of type 'system.collections.generic.list(of anonymous type )' cannot be converted to ...

My code is like this:

Public Function selectAll() As List(Of tblProduct)
    Dim result = From product In dc.tblProducts
                 Select New With
                 {
                    Key .productID = product.pk_product_id,
                    Key .productNameKg = Convert.ToString(product.product_name) & " " & Convert.ToString(product.product_price_kg)
                 }

    Return result.ToList()
End Function

This is the dropdownlist that I want to fill.

    <asp:DropDownList ID="DropDownList1" runat="server" 
        DataSourceID="ObjectDataSource1" DataTextField="productNameKg" 
        DataValueField="productID">
    </asp:DropDownList>

Thanks

Grtz Simke