How to make add elements method for dictionary in OOP?

Question

I can't find any .add() method and I don't know what I can do for this.

public class MyDictionary<TKey, Tvalue>
{ 
    private MyDictionary<TKey, Tvalue> md ;
    public MyDictionary (int size) 
    { 
       md = new MyDictionary<TKey, Tvalue>(size); 
    }
    public void AddItem(TKey key, Tvalue value)
    { 
      md[key] = value;
    }
}

There is red line under md.[key] and it says:

Cannot apply indexing with [] to an expression of type MyDictionary

You need to write an [indexer](https://learn.microsoft.com/en-us/dotnet/csharp/indexers). But note that at the moment you'd have a stack overflow as soon as you call your constructor - because it will immediately recurse. — Jon Skeet, Jul 05 '19 at 15:46
`md.Add(key, value); ` will solve your problem; to add new item to dictionary you need to pass respective key and value to add method. Method name is `.Add(key, Value);` not `.add(key, value)` — Prasad Telkikar, Jul 05 '19 at 15:51
You realise that your `MyDictionary` doesn't inherit `Dictionary` so it won't have the methods that come with a `Dictionary`? So maybe your class declaration should look like this `public class MyDictionary : Dictionary` ? — Rand Random, Jul 05 '19 at 15:55

score 0 · Answer 1 · answered Jul 05 '19 at 15:54

0

public void Add(TKey key, TValue value)
{
    this.Insert(key, value);
}

From this link

answered Jul 05 '19 at 15:54

Sam Mullinix

196
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How to make add elements method for dictionary in OOP?

1 Answers1