Just my opinion...

Uh…  No.  I get this rhetorical question from fellow developers a lot.  LINQ uses the “from-where-select” syntax (with the “from” and the “select” in a more sensible order) from SQL but that’s only to give developers a familiar model.

LINQ can be used to query relational data sources like, SQL Server, Oracle, MySql, etc.  LINQ can also be used to solve general programming problems in a functional way.

Go take a quick look here for a rather contrived puzzle example.  If you still think LINQ was made just to query relational data after looking at it…  I’m not sure how to make it clearer for you.