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

To avoid typing out the values for a Flags enum by hand.

public enum MyEnum
{
    open     = 0x01,
    close    = 0x02,
    Maybe    = 0x04,
    ........
}