Question

I am adding functionality to an existing .Net collection. In order to do this, I am overriding several functions. I have not been able to override the return value of the basic array return in the collection. For example, if I call emailMessage.To[i], it does not return the proper value, but if I call emailMessage.Item(i), it returns the correct value. Below is the code from my class. What do I need to override to correct the first error?

namespace EmailService
{
    public class MailAddressCollection : System.Net.Mail.MailAddressCollection
    {
        public MailAddressCollection() : base()
        {
        }

        public void Add(MailAddress Address)
        {
             base.Add(Address);
        }

        public MailAddress Item(int index)
        {
            return (MailAddress)(base.Items[index]);
        }

    }
}

Answer 1

public MailAddress this[int index] 
{
   get { return ((MailAddress)(base.Items[index]); }
}