C# 我如何从字典继承？

How do I inherit from Dictionary?

提问by Pratik Deoghare

I want all the functionality of Dictionary<TKey,TValue>but I want it as Foo<TKey,TValue>.
How should I go about doing this?
Currently I am using

我想要 的所有功能，Dictionary<TKey,TValue>但我想要它作为Foo<TKey,TValue>.
我该怎么做呢？
目前我正在使用

class Foo<TKey,TValue> : Dictionary<TKey, TValue>
{   
    /*
     I'm getting all sorts of errors because I don't know how to 
     overload the constructors of the parent class.
    */
    // overloaded methods and constructors goes here.

    Foo<TKey,TValue>():base(){}
    Foo<TKey,TValue>(int capacity):base(capacity){}

}

What is the right way to overload constructors and methods of the parent class?

重载父类的构造函数和方法的正确方法是什么？

NOTE:I think I have misused the word 'overload' please correct it or suggest correction.

注意：我想我误用了“过载”这个词，请更正或建议更正。

采纳答案by Jake Pearson

You were close, you just need to remove the type parameters from the constructors.

你很接近，你只需要从构造函数中删除类型参数。

class Foo<TKey,TValue> : Dictionary<TKey, TValue>
{   
    Foo():base(){}
    Foo(int capacity):base(capacity){}
}

To override a method you can use the override keyword.

要覆盖方法，您可以使用 override 关键字。

回答by Stefan Steinegger

Not directly answering your question, just an advice. I would not inherit the dictionary, I would implement IDictionary<T,K>and aggregate a Dictionary. It is most probably a better solution:

不直接回答你的问题，只是一个建议。我不会继承字典，我会实现IDictionary<T,K>并聚合一个字典。这很可能是一个更好的解决方案：

class Foo<TKey,TValue> : IDictionary<TKey, TValue>
{   

    private Dictionary<TKey, TValue> myDict;

    // ...
}

回答by Slai

If you just want the same type but with a different name, you can shorten it with usingalias:

如果您只想要相同的类型但名称不同，则可以使用using别名缩短它：

using Foo = System.Collections.Generic.Dictionary<string, string>;

and then

进而

Foo f = new Foo();