Question

I have a class that inherits a generic dictionary and an inteface

public class MyDictionary: Dictionary<string, IFoo>, IMyDictionary { } 

the issue is that consumers of this class are looking for the ‘.Keys’ and ‘.Values’ properties of the interface so i added:

    /// <summary>     ///      /// </summary>     ICollection<string> Keys { get; }      /// <summary>     ///      /// </summary>     IEnumerable<IFoo> Values { get; } 

to the interface.

Now, the implementation needs to have this as well but when i implement these, i get this error:

‘The keyword new is required because it hides property Keys . .. ‘

so what do i need to do. Should i be adding a ‘new’ in front of these get properties?

Answer 1

Another option would be to change the types on the interface to be:

public interface IMyDictionary {     /// <summary>     ///      /// </summary>     Dictionary<string, IFoo>.KeyCollection Keys { get; }      /// <summary>     ///      /// </summary>     Dictionary<string, IFoo>.ValueCollection Values { get; } } 

That way the interface is already implemented by the dictionary saving you the trouble of implementing the properties again, and it doesn’t hide or cover the original implementation.