How do I inherit from Dictionary?

Question

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

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?

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

Answer 1

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

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

To override a method you can use the override keyword.

Answer 2

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:

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

    private Dictionary<TKey, TValue> myDict;

    // ...
}

Answer 3

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

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

and then

Foo f = new Foo();