Tim in this case, i'm not sure;

I created a Simple Class library, and this is teh entire code, which compiles correctly in the full version of Visual Studio 2010;

My project compiles no problem whether i go to Project>>Properties>>Compile>>Advanced Compile Objects, and i point it at any framework, 2.0, 3.5 or 4.0.

Imports System.Data

Imports System.Data.SqlClient

Public Class Class1

Private Sub x()

'form a command that waits longer than 30 seconds for testing

Dim sqlcmd As String = "WaitFor Delay '00:00:45';SELECT name FROM sys.tables;"

Dim mySqlConnectionFormat As String = "data source={0};initial catalog={1};user id={2};password={3};Trusted_Connection=False;Connect Timeout=600;Application Name=GhostInTheMachine;"

Dim MyConn As New SqlConnection

MyConn.ConnectionString = String.Format(mySqlConnectionFormat, ".", "SandBox", "Noobie", "NotARealPassword")

MyConn.Open()

'now lets get a command object

Dim mySqlCommand As New SqlCommand

mySqlCommand.Connection = MyConn

mySqlCommand.CommandTimeout = 600

mySqlCommand.CommandType = CommandType.Text

mySqlCommand.CommandText = sqlcmd

Dim myDataReader As SqlDataReader

myDataReader = mySqlCommand.ExecuteReader

' could either loop thru the reader itself, or stick it into a datatable .

Dim MyDataTable As New DataTable

MyDataTable.Load(myDataReader)

'do something witht eh data?

For Each dr As DataRow In MyDataTable.Rows

Debug.Print(dr!name) ' [name] because i Know the column name from the query.

Next

End Sub

End Class

so my first question would be, on the developer machine you are fiddling with, do you have the .Net frameworks installed?

look in C:\windows\Microsoft.NET\Framework, you should see multiple folders like this, representing each framework installed: