How do I inherit from Dictionary?

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.