I have just odne something like

[ServiceContract]

    public interface IService1
    {        
        [OperationContract]
        Hashtable MyHashTable();

        // TODO: Add your service operations here
    }

and implemented as

public Hashtable MyHashTable()
        {
            Hashtable h = new Hashtable();
            for (int i = 0; i < 10; i++)
                h.Add(i, "val" + i.ToString());

            return h;
        }

When I am trying to run the service , I am getting the error "This operation is not supported in WCF test client"

Why so?

Thanks