public class A
{public A(B b){this.B = b;}public B B { get; set; }public void Test(B b){Console.WriteLine(b.ToString());}
}

public interface IAnalyse{/// <summary>/// 显示结果/// </summary>void ShowResult();}

public class Analyse:IDAL.IAnalyse { public void ShowResult() { Console.WriteLine("分析底层数据库交互"); } }

      /// <summary>/// 显示结果/// </summary>public void ShowResult(){////以前思路 需要引用IBLL,IDAL,DALIDAL.IAnalyse dal = new DAL.Analyse();dal.ShowResult();}

class Program{static void Main(string[] args){OldMethod();Console.ReadKey();}/// <summary>/// 在使用IOC前的写法。需要引入IBLL,BLL/// </summary>static void OldMethod(){IBLL.IAnalyse bll = new BLL.Analyse();bll.ShowResult(); }}

static void Main(string[] args){//OldMethod();
            IOCMethod1();Console.ReadKey();}static void IOCMethod1(){IUnityContainer container=new UnityContainer();////在容器中注册一种类型，它是一个类型的映射，接口类型是IAnalyse，希望返回的类型是Analysecontainer.RegisterType<IBLL.IAnalyse, BLL.Analyse>();////第二种写法//container.RegisterType(typeof (IBLL.IAnalyse), typeof (BLL.Analyse));IBLL.IAnalyse bll = container.Resolve<IBLL.IAnalyse>();bll.ShowResult();}

namespace Core
{/// <summary>/// 类型注册/// </summary>public class DependencyRegister{public static IUnityContainer DependencyRegisterContainer(){IUnityContainer container = new UnityContainer();container.RegisterType<IBLL.IAnalyse, BLL.Analyse>().RegisterType<IDAL.IAnalyse, DAL.Analyse>();return container;}}
}////UI层 先移除BLL，引用Core
static void Main(string[] args){IOCMethod2();Console.ReadKey();}static void IOCMethod2(){　　IUnityContainer container = DependencyRegister.DependencyRegisterContainer();

IBLL.IAnalyse bll = container.Resolve<IBLL.IAnalyse>();  bll.ShowResult();  　　　　}

    <!-- 程序集--><assembly name="IBLL"/><assembly name="IDAL"/><!--要返回的类型--><alias alias="BLLAnalyse1" type="BLL.Analyse, BLL" /><container name="ContainerAnalyse"><register type="IBLL.IAnalyse" name="BLLAnalyse1" mapTo="BLLAnalyse1" /></container>

private static void IOCMethod3(){////通过配置文件注册所有类型IUnityContainer container=new UnityContainer();UnityConfigurationSection section = (UnityConfigurationSection)ConfigurationManager.GetSection("unity");section.Configure(container, "ContainerAnalyse");IBLL.IAnalyse bll = container.Resolve<IBLL.IAnalyse>("BLLAnalyse1");bll.ShowResult();}

namespace BLL
{public class Analyse:IBLL.IAnalyse{////使用依赖注入
        [Dependency]public IDAL.IAnalyse dal { get; set; }/// <summary>/// 显示结果/// </summary>public void ShowResult(){////以前思路 需要引用IBLL,IDAL,DAL//IDAL.IAnalyse dal = new DAL.Analyse();
            dal.ShowResult();}}
}