>Hello Everybody.
>
>Ok - so I completed my first .NET app (desktop in vb.net and a asp.net web portion), compiled it in x86, install it on WindowsXP (32bit) and Windows 7 (64bit) machines, and it works great. - Hurray :-)
>
>Now i have some Windows XP 64 bit machines where i got an error right when I am starting the app (the desktop program). I think there was some mentioning about the System.Windows.Forms namespace.
>
>Well, so I am thinking to myself: "sure that makes sence, just recompile as "AnyCPU".
>
>Oops - maybe not. First i got some complaints about LINQ - so i converted that code to the System.Data.SqlClient stuff. Still everything works great on the other machienes (reinstalled).
>
>But now i get an error when compiling (not the code sections I converted) as follows (about 72 errors):

>Dim MasterTypeRow As DataTable = _
>   Me.TableAdapterManager1.DocumentTypesTableAdapter.GetType_Level0( _ 
>      Me.DocList(nRow, 3), Me.DocList(nRow, 4), Me.DocList(nRow, 5))
>
>' this following line triggers the error
>Dim MasterType As String = MasterTypeRow(0)("Type_level0")

>throughs the error:

>'ElementAtOrDefault' is not a member of 'System.Data.EnumerableRowCollection(Of System.Data.DataRow)'.

>Does anybody have an idea what i am missing here?

Importing System.Linq ?

>
>Thank you for all your help!