unity是一个轻量级ioc容器，它为方便开发者建立松散耦合的应用程序，可以在  下载获取

一个简单的日志功能的配置：

日志类和接口：

public interface ILog    {        void LogMessage(string msg);    }    class LocalLog : ILog    {        public void LogMessage(string msg)        {            Console.WriteLine("LocalLog..." + msg);        }    }    public class RemoteLog : ILog    {        public void LogMessage(string msg)        {            Console.WriteLine("RemoteLog...." + msg);        }    }

注册和调用：

class Program    {        static void Main(string[] args)        {            IUnityContainer unityContainer = new UnityContainer();            //注册映射            unityContainer.RegisterType
     
      ("local")                          .RegisterType
      
       ("remote");            var localLog = unityContainer.Resolve
       
        ("local");            localLog.LogMessage("msg1");            //构造函数参数传入            //可以直接传入一个IEnumerable类型的ParameterOverrides，也可以多个ParameterOverride            //都是key，value的形式            var t = unityContainer.Resolve
        
         (  new ParameterOverrides {                         { "param", "yyy" }                     });           //也可以这样传入参数           //unityContainer.Resolve
         
          (new ParameterOverride("param", "xxx"));            //通过Dependency特性属性注入           t.LogService.LogMessage("error1");           Console.WriteLine(t.Param);        }    }    class TestLog    {        [Dependency("remote")]        public ILog LogService { get; set; }        public string Param { get; set; }        public TestLog(string param)        {            Param = param;        }    }