C#, Flags Enum, Generic function to look for a flag

Question

I\'d like one general purpose function that could be used with any Flags style enum to see if a flag exists.

This doesn\'t compile, but if anyone has a suggestion, I

Answer 1

Question long over, but here's one for reference anyway:

    public static bool HasFlag(this TEnum enumeratedType, TEnum value)
        where TEnum : struct, IComparable, IFormattable, IConvertible

    {
        if (!(enumeratedType is Enum))
        {
            throw new InvalidOperationException("Struct is not an Enum.");
        }

        if (typeof(TEnum).GetCustomAttributes(
            typeof(FlagsAttribute), false).Length == 0)
        {
            throw new InvalidOperationException("Enum must use [Flags].");
        }

        long enumValue = enumeratedType.ToInt64(CultureInfo.InvariantCulture);
        long flagValue = value.ToInt64(CultureInfo.InvariantCulture);

        if ((enumValue & flagValue) == flagValue)
        {
            return true;
        }

        return false;
    }