namespace StrategyPattern.Enumerations
{
    public static class EventEnumerations
    {
        public enum CustomerType
        {
            [DiscountTypeAttribute(typeof(NullDiscountStrategy))]
            Standard,
            [DiscountTypeAttribute(typeof(StudentDiscountStrategy))]
            Student,
            [DiscountTypeAttribute(typeof(NotForProfitDiscountStrategy))]
            NotForProfit,
            [DiscountTypeAttribute(typeof(GroupDiscountStrategy))]
            Group
        }
    }
}

//in another class you can define the attribute:

namespace StrategyPattern.Attributes
{
    public class DiscountTypeAttribute : Attribute
    {
        public Type DiscountStrategy { get; set; }

        public DiscountTypeAttribute(Type discountStrategy)
        {
            DiscountStrategy = discountStrategy;
        }
    }
}