Microsoft.VisualC 命名空间包含支持用 c + + 语言的代码生成和编译的类。 混合编程中使用COM接口指针 Microsoft.VisualC.StlClr 

 1 using System;
 2 using System.Reflection;
 3 
 4 // An enumeration of animals. Start at 1 (0 = uninitialized).
 5 public enum Animal {
 6     // Pets.
 7     Dog = 1,
 8     Cat,
 9     Bird,
10 }
11 
12 // A custom attribute to allow a target to have a pet.
13 public class AnimalTypeAttribute : Attribute {
14     // The constructor is called when the attribute is set.
15     public AnimalTypeAttribute(Animal pet) {
16         thePet = pet;
17     }
18 
19     // Keep a variable internally ...
20     protected Animal thePet;
21 
22     // .. and show a copy to the outside world.
23     public Animal Pet {
24         get { return thePet; }
25         set { thePet = value; }
26     }
27 }
28 
29 // 一个测试类，每种方法都有自己的宠物pet.
30 class AnimalTypeTestClass {
31     [AnimalType(Animal.Dog)]
32     public void DogMethod() {}
33 
34     [AnimalType(Animal.Cat)]
35     public void CatMethod() {}
36 
37     [AnimalType(Animal.Bird)]
38     public void BirdMethod() {}
39 }
40 
41 class DemoClass {
42     static void Main(string[] args) {
43         AnimalTypeTestClass testClass = new AnimalTypeTestClass();
44         Type type = testClass.GetType();
45         // Iterate through all the methods of the class.
46         foreach(MethodInfo mInfo in type.GetMethods()) {
47             // Iterate through all the Attributes for each method.
48             foreach (Attribute attr in
49                 Attribute.GetCustomAttributes(mInfo)) {
50                 // Check for the AnimalType attribute.
51                 if (attr.GetType() == typeof(AnimalTypeAttribute))
52                     Console.WriteLine(
53                         "Method {0} has a pet {1} attribute.",
54                         mInfo.Name, ((AnimalTypeAttribute)attr).Pet);
55             }
56 
57         }
58     }
59 }
60 /*
61  * Output:
62  * Method DogMethod has a pet Dog attribute.
63  * Method CatMethod has a pet Cat attribute.
64  * Method BirdMethod has a pet Bird attribute.
65  */