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using System;using System.Reflection;// An enumeration of animals. Start at 1 (0 = uninitialized).public enum Animal{    // Pets.    Dog = 1,    Cat,    Bird,}// A custom attribute to allow a target to have a pet.public class AnimalTypeAttribute : Attribute{    // The constructor is called when the attribute is set.    public AnimalTypeAttribute(Animal pet)    {        thePet = pet;    }    // Keep a variable internally ...    protected Animal thePet;    // .. and show a copy to the outside world.    public Animal Pet    {        get { return thePet; }        set { thePet = value; }    }}// A test class where each method has its own pet.class AnimalTypeTestClass{    [AnimalType(Animal.Dog)]    public void DogMethod() { }    [AnimalType(Animal.Cat)]    public void CatMethod() { }    [AnimalType(Animal.Bird)]    public void BirdMethod() { }}namespace ConsoleApplication3{    class Program    {        static void Main(string[] args)        {            AnimalTypeTestClass testClass = new AnimalTypeTestClass();            Type type = testClass.GetType();            // Iterate through all the methods of the class.            foreach (MethodInfo mInfo in type.GetMethods())            {                // Iterate through all the Attributes for each method.                foreach (Attribute attr in Attribute.GetCustomAttributes(mInfo))                {                    // Check for the AnimalType attribute.                    if (attr.GetType() == typeof(AnimalTypeAttribute))                        Console.WriteLine(                            "Method {0} has a pet {1} attribute.",                            mInfo.Name, ((AnimalTypeAttribute)attr).Pet);                }            }        }    }}

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