Comparing enum flags in C#

Question

I need to detect if a flag is set within an enum value, which type is marked with the Flag attribute.

Usually it is made like that:

(value & flag) ==         


        

Answer 1

For me it looks overcomplicated. How about this (keeping in mind that enum is always mapped to an integer value type):

public static bool IsSet(T value, T flags) where T : struct
{
    // You can add enum type checking to be perfectly sure that T is enum, this have some cost however
    // if (!typeof(T).IsEnum)
    //     throw new ArgumentException();
    long longFlags = Convert.ToInt64(flags);
    return (Convert.ToInt64(value) & longFlags) == longFlags;
}