小编pag*_*ick的帖子

我不明白为什么C#在以下完整情况下不会推断出类型:

public interface IThing {}

public class Thing1 : IThing {}

public class Thing2 : IThing {}

public interface IContainer {}

public class Container1 : IContainer
{
    public IThing A { get { return new Thing1(); } }
    public IThing B { get { return new Thing2(); } }
}

public class Container2 : IContainer
{
    public IThing C { get { return new Thing1(); } }
    public IThing D { get { return new Thing2(); } }
}

public …