LInQ (Language Integrated Query)

from: [http://developer.alexanderklimov.ru/linq.php]

initialization:

var criteria =
from variable in source
where ...
select variable or group;

call:

foreach (int i in criteria) Console.Write(i + " ");

also used:
ascending, by , descending, equals, from, group, in, into, join, let, on, orderby, select, where

delegates(C#) vs function pointers(C) vs function object(javascript)

http://blog.slaks.net/2011/06/delegates-vs-function-pointers-part-1.html/
http://blog.slaks.net/2011/06/delegates-vs-function-pointers-part-2-c.html/
http://blog.slaks.net/2011/06/delegates-vs-function-pointers-part-3-c.html/

What is new in c# 3.0?

http://www.albahari.com/nutshell/whatsnewcs30.aspx