IOC控制反转

public interface IDataBase
{
    void Add<T>(T data);
    IQueryable<T> Get<T>();
}
[Export(typeof(IDataBase))]     //导出
public class GWDataBase : DbContext, IDataBase
{
}

AssemblyCatalog catalog = new AssemblyCatalog(Assembly.Load("DataBaseMap"));
CompositionContainer container = new CompositionContainer(catalog);
return container.GetExport<IDataBase>().Value;

UnityContainer container = new UnityContainer();//创建容器
container.RegisterType<Test01.IWaterTool, Test01.PressWater>();//注册依赖对象
IWaterTool obj = container.Resolve<IWaterTool>();

[Dependency