c# enum flags code example

Example 1: flag attribute in enum c#

[Flags]
public enum Options : byte
{
    None    = 0,
    One     = 1 << 0,       // 1
    // now that value 1 is available, start shifting from there
    Two     = One << 1,     // 2
    Three   = Two << 1,     // 4
    Four    = Three << 1,   // 8

    // same combinations
    OneAndTwo = One | Two,
    OneTwoAndThree = One | Two | Three,
}

Example 2: define enum c#

enum WeekDays
{
    Monday = 0,
    Tuesday =1,
    Wednesday = 2,
    Thursday = 3,
    Friday = 4,
    Saturday =5,
    Sunday = 6
}

Console.WriteLine(WeekDays.Friday);
Console.WriteLine((int)WeekDays.Friday);