c# - 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 << 01,
    Maybe    = 1 << 02,
    ........
}

The << operand is the shift operand, which shifts the first operand left by the number bits specified in the second operand.

But why would someone use this in an enum declaration?

question from:https://stackoverflow.com/questions/17888141/why-would-someone-use-the-operator-in-an-enum-declaration

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,
    ........
}