Why would someone use the << operator in an enum declaration?

Question

I was looking at the code I have currently in my project and found something like this:

public enum MyEnum
{
    open     = 1 << 00,
    close    = 1 &         


        

Answer 1

This allows you to do something like this:

var myEnumValue = MyEnum.open | MyEnum.close;

without needing to count bit values of multiples of 2.

(like this):

public enum MyEnum
{
    open     = 1,
    close    = 2,
    Maybe    = 4,
    ........
}