Is there a web app allow me to search through large repositories of code?

Question

If I am looking for a particular C# language construct or how to use a keyword in JavaScript, I would like to search only in code, not in blog paragraphs about code.

I thought I could do this at code.google.com but there if I type in e.g.

"protected internal"

I get discussions about that keyword and have to look through the results to find actual code.

What are some web app search machines which allow me to search through large repositories of code only?

Answer 1

Google Code Search.

Try this: "protect internal"

Answer 2

GitHub lets you search through code.

Answer 3

Krugle

You can also search that in Krugle.

Answer 4

Just remembered another one: Koders.com