SSIS Expression Language Reference

SQL Server 2005 Integration services also called as SSIS introduced a new language to define expression. It is quite astonishing to see all new language defined for writing the expressions instead of using existing Microsoft languages like C#, VB.NET. Anyway we have to master this new language to learn write expressions in SSIS and here is the reference guide available in MSDN http://msdn2.microsoft.com/en-us/library/ms141232.aspx