C#基础学习系列之Attribute和反射详解

　　[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method |

　　AttributeTargets.Property | AttributeTargets.Field,

　　Inherited = true)]

　　public class InheritedAttribute : Attribute

　　{}

　　[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method |

　　AttributeTargets.Property | AttributeTargets.Field,

　　Inherited = false)]

　　public class NotInheritedAttribute : Attribute

　　{}

　　using System;

　　using System.Reflection;

　　[InheritedAttribute]

　　public class BaseA

　　{

　　[InheritedAttribute]

　　public virtual void MethodA()

　　{}

　　}

　　public class DerivedA : BaseA

　　{

　　public override void MethodA()

　　{}

　　}

　　[NotInheritedAttribute]

　　public class BaseB

　　{

　　[NotInheritedAttribute]

　　public virtual void MethodB()

　　{}

　　}

　　public class DerivedB : BaseB

　　{

　　public override void MethodB()

　　{}

　　}

　　public class Example

　　{

　　public static void Main()

　　{

　　Type typeA = typeof(DerivedA);

　　Console.WriteLine("DerivedA has Inherited attribute: {0}",

　　typeA.GetCustomAttributes(typeof(InheritedAttribute), true).Length > 0);

　　MethodInfo memberA = typeA.GetMethod("MethodA");

　　Console.WriteLine("DerivedA.MemberA has Inherited attribute: {0}

　　",

　　memberA.GetCustomAttributes(typeof(InheritedAttribute), true).Length > 0);

　　Type typeB = typeof(DerivedB);

　　Console.WriteLine("DerivedB has Inherited attribute: {0}",

　　typeB.GetCustomAttributes(typeof(InheritedAttribute), true).Length > 0);

　　MethodInfo memberB = typeB.GetMethod("MethodB");

　　Console.WriteLine("DerivedB.MemberB has Inherited attribute: {0}",

　　memberB.GetCustomAttributes(typeof(InheritedAttribute), true).Length > 0);

　　}

　　}

　　// The example displays the following output:

　　// DerivedA has Inherited attribute: True

　　// DerivedA.MemberA has Inherited attribute: True

　　//

　　// DerivedB has Inherited attribute: False

　　// DerivedB.MemberB has Inherited attribute: False