你能够订阅一个接口，然后发布基于这个接口的实现。

让我们看下一个示例。我有一个接口IAnimal和两个实现Cat和Dog：

public interface IAnimal{    string Name { get; set; }}public class Cat : IAnimal{    public string Name { get; set; }    public string Meow { get; set; }}public class Dog : IAnimal{    public string Name { get; set; }    public string Bark { get; set; }}

我能够订阅IAnimal接口，并接收Cat和Dog这个两个类:

bus.Subscribe
    
     ("polymorphic_test",    @interface =>    {        var cat = @interface as Cat;        var dog = @interface as Dog;        if (cat != null)        {            Console.WriteLine("Name = {0}", cat.Name);            Console.WriteLine("Meow = {0}", cat.Meow);        }        else if (dog != null)        {            Console.WriteLine("Name = {0}", dog.Name);            Console.WriteLine("Bark = {0}", dog.Bark);        }        else        {            Console.WriteLine("message was not a                dog or a cat");        }    });
    

让我们发布Cat和Dog：

var cat = new Cat{    Name = "Gobbolino",    Meow = "Purr"};var dog = new Dog{    Name = "Rover",    Bark = "Woof"};bus.Publish
    
     (cat);bus.Publish
     
      (dog);
     
    

注意：必须显示的指定发布了IAnimal接口。EasyNetQ在发布和订阅方法中指定了泛型去发布和订阅。

英文地址：https://github.com/EasyNetQ/EasyNetQ/wiki/Polymorphic-Publish-and-Subscribe

本文地址：http://www.cnblogs.com/HuangLiang/p/EasyNetQ_Polymorphic_Publish_and_Subscribe.html