C# Language Bitwise Manipulation using enums


Example

The FlagsAttribute should be used whenever the enumerable represents a collection of flags, rather than a single value. The numeric value assigned to each enum value helps when manipulating enums using bitwise operators.

Example 1 : With [Flags]

[Flags]
enum Colors
{
    Red=1,
    Blue=2,
    Green=4,
    Yellow=8
}

var color = Colors.Red | Colors.Blue;
Console.WriteLine(color.ToString());

prints Red,Blue

Example 2 : Without [Flags]

enum Colors
{
    Red=1,
    Blue=2,
    Green=4,
    Yellow=8
}
var color = Colors.Red | Colors.Blue;
Console.WriteLine(color.ToString());

prints 3