DynamicQuery

An improvement of the original Dynamic Linq MSDN sample

Main Additions

• Allow to specify the list of types that can be used from within the expression.
• Improve enum handling, so that comparing enums will work.
• Add support for FirstOrDefault() and Contains().
• Allow referencing the parent "it" context using "it_x" syntax.
• Add support for "as" and "is" operators.