c# - 来自内部的公共接口？

Question

一个程序集向外界公开了几个接口（IFirst, ISecond, ），即这些接口是.IThirdpublic

现在，作为实现细节，所有这些对象都有一个共同的特征，由接口描述IBase。我不想IBase公开，因为这可能会在未来的实现中发生变化，并且与我的程序集的用户完全无关。

显然，公共接口不能从内部接口派生（给我一个编译器错误）。

有什么方法可以表达IFirst, ISecond, 并且IThird仅从内部的角度来看有一些共同点吗？

Answer 1

不在 C# 中

您能做的最好的事情就是让您的类同时实现内部和公共接口。

Answer 2

正如安德鲁上面所说。只是为了扩展，这里有一个代码示例：

public interface IFirst
{
    string FirstMethod();
}

public interface ISecond
{
    string SecondMethod();
}

internal interface IBase
{
    string BaseMethod();
}

public class First: IFirst, IBase
{
    public static IFirst Create()  // Don't really need a factory method;
    {                              // this is just as an example.
        return new First();
    }

    private First()  // Don't really need to make this private,
    {                // I'm just doing this as an example.
    }

    public string FirstMethod()
    {
        return "FirstMethod";
    }

    public string BaseMethod()
    {
        return "BaseMethod";
    }
}

public class Second: ISecond, IBase
{
    public static ISecond Create()  // Don't really need a factory method;
    {                               // this is just as an example.
        return new Second();
    }

    private Second()  // Don't really need to make this private,
    {                 // I'm just doing this as an example.
    }

    public string SecondMethod()
    {
        return "SecondMethod";
    }

    public string BaseMethod()
    {
        return "BaseMethod";
    }
}