Using bit flags in C#

BitFlags

[Flags]
public enum ExampleEnum
{
    A = 1 << 0,
    B = 1 << 1,
    C = 1 << 2,
    D = 1 << 3,
    E = 1 << 4,
}

public class Program
{
    static void Main(string[] args)
    {
        var foo = ExampleEnum.A | ExampleEnum.B | ExampleEnum.C;
        if ((foo & ExampleEnum.B) == ExampleEnum.B) // contains flag B!
        {

        }
    }
}

public static bool HasBitFlag(this ExampleEnum e, ExampleEnum other)
{
     return ((e & other) == other);
}