I've found this articles (liks below) but method which is described in those articles doesn't work for DLL which was compiled with target framework 4.0!

Articles:
<http://oassaf.wordpress.com/2007/05/24/calling-c-assembly-from-ssis-script-task/>
<http://www.codeproject.com/KB/database/SSIS_Call.aspx>
<http://blogs.msdn.com/b/michen/archive/2007/04/22/com-references-within-an-ssis-script-component.aspx>

Any ideas?

version: SSIS 2008 R2