问题描述
是否仅通过一个接口就可以由此创建对象?
It is possible, given only an interface, to create an object from this?
类似的东西:
var obj = new IWidget();
(我知道此代码不正确-VS不能创建IWidget的实例)
(I know this code isn't right - VS stays cannot create an instance of IWidget)
我所处的环境中,我的项目具有对接口的引用,并且我想创建具体的对象并从方法中返回它们-但我无法弄清楚如何仅从接口创建对象./p>
I'm in a context where my project has references to the interfaces, and I want to create concrete objects and return them from a method - but I can't figure out how to create the objects purely from the interfaces.
推荐答案
您不能从接口创建对象.您可以从使用该接口的类中创建一个对象.
You can't create an object from an interface. You can create an object from a class that uses that interface.
例如:
IList<string> x = new IList<string>();
不起作用.
IList<string> x = new List<string>();
会.
无法创建接口,只能创建使用该接口的对象.
Interfaces cannot be created, only objects that use the interface can be created.
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