思路：
1、注册类型：把类型完整名称作为key添加到数据字典中，类型添加到数据字典的value中
2、获取实例：根据完整类型名称也就是key取出value，用反射创建类型的实例
1、IPhone接口
namespace SimplestUnity { interface IPhone { void Call(); } }
2、AndroidPhone实现
namespace SimplestUnity { public class AndroidPhone:IPhone { public AndroidPhone() { Console.WriteLine("{0}构造函数", this.GetType().Name); } public void Call() { Console.WriteLine("{0}打电话", this.GetType().Name); } }
}
3、容器--接口
namespace SimplestUnity { public interface IDaivdContainer { void RegisterType<TFrom, TTo>(); T Resolve<T>(); } }
4、容器--实现
namespace SimplestUnity { public class DaivdContainer:IDaivdContainer { private Dictionary<string, Type> containerDictionary = new Dictionary<string, Type>();//字典 public void RegisterType<TFrom, TTo>() { containerDictionary.Add(typeof(TFrom).FullName, typeof(TTo)); } public T Resolve<T>() { Type type = containerDictionary[typeof(T).FullName]; return (T)Activator.CreateInstance(type); } } }
5、调用
class Program { static void Main(string[] args) { DaivdContainer davidContainer = new DaivdContainer(); davidContainer.RegisterType<IPhone, AndroidPhone>(); IPhone iphone = davidContainer.Resolve<IPhone>();
iphone.Call(); } }
原文：https://www.cnblogs.com/menglin2010/p/12079718.html