ConcurrentDictionary和IDictionary [英] ConcurrentDictionary and IDictionary

问题描述

我注意到ConcurrentDictionary实现了IDictionary接口，尽管接口支持Add，ConcurrentDictionary没有该函数。这个怎么用？我认为接口强加了实现类的功能...

I noticed that ConcurrentDictionary implements the IDictionary interface, yet despite that the interface supports Add, ConcurrentDictionary doesn't have that function. How does this work? I thought interfaces imposed functionality on the implementing classes...

推荐答案

它使用显式接口实现。这是一个例子。

It is using explicit interface implementation. Here is an example.

interface IFoo
{
   void Foo();
}

class FooImplementation : IFoo
{
   void IFoo.Foo()
   {
   }
}

如果您将 ConcurrentDictionary $ c> IDictionary ，可以使用所有定义的方法。

If you assign or cast a ConcurrentDictionary to IDictionary, you can use all the methods defined there.

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