What do two left-angle brackets “<<” mean in C#?

Question

Basically the questions in the title. I\'m looking at the MVC 2 source code:

[Flags]
public enum HttpVerbs {
    Get = 1 << 0,
    Post = 1 << 1,         


        

Answer 1

The purpose of the loop is most likely to generate or operate on all subsets of the set of items in the list. And the loop body most likely also has a good bit (har har) of bitwise operations, namely both another left-shift and bitwise-and. (So rewriting it to use Pow would be mighty stupid, I can hardly believe there were so many people that actually suggested that.)