SSIS and dotNET 3.5

Question

I was wondering if I can get a 2008 SSIS package to reference .NET 3.5 assemblies? In my case I want to use LINQ-->XML so I can make use of XML literals in a script task. (Otherwise I need to deal with a large number of string concatenations.)

NOTE: I know I can use a C# script task and declare my string as

String myString = @"This is the first line of my string.
This is the second line of my string.
This is the third line of the string.";

but I was hoping for a VB.NET solution.

Thanks.