public static class EnumExtensions
{
    /// 

    /// Gets all items for an enum value.
    /// 
    /// 
    /// The value.
    /// 
    public static IEnumerable GetAllItems(this Enum value)
    {
        foreach (object item in Enum.GetValues(typeof(T)))
        {
            yield return (T)item;
        }
    }

    /// 

    /// Gets all items for an enum type.
    /// 
    /// 
    /// The value.
    /// 
    public static IEnumerable GetAllItems() where T : struct
    {
        foreach (object item in Enum.GetValues(typeof(T)))
        {
            yield return (T)item;
        }
    }

    /// 

    /// Gets all combined items from an enum value.
    /// 
    /// 
    /// The value.
    /// 
    /// 
    /// Displays ValueA and ValueB.
    /// 
    /// EnumExample dummy = EnumExample.Combi;
    /// foreach (var item in dummy.GetAllSelectedItems())
    /// {
    ///    Console.WriteLine(item);
    /// }
    /// 
    /// 
    public static IEnumerable GetAllSelectedItems(this Enum value)
    {
        int valueAsInt = Convert.ToInt32(value, CultureInfo.InvariantCulture);

        foreach (object item in Enum.GetValues(typeof(T)))
        {
            int itemAsInt = Convert.ToInt32(item, CultureInfo.InvariantCulture);

            if (itemAsInt == (valueAsInt & itemAsInt))
            {
                yield return (T)item;
            }
        }
    }

    /// 

    /// Determines whether the enum value contains a specific value.
    /// 
    /// The value.
    /// The request.
    /// 
    ///     true if value contains the specified value; otherwise, false.
    /// 
    /// 
    /// 
    /// EnumExample dummy = EnumExample.Combi;
    /// if (dummy.Contains(EnumExample.ValueA))
    /// {
    ///     Console.WriteLine("dummy contains EnumExample.ValueA");
    /// }
    /// 
    /// 
    public static bool Contains(this Enum value, T request)
    {
        int valueAsInt = Convert.ToInt32(value, CultureInfo.InvariantCulture);
        int requestAsInt = Convert.ToInt32(request, CultureInfo.InvariantCulture);

        if (requestAsInt == (valueAsInt & requestAsInt))
        {
            return true;
        }

        return false;
    }
}