Extension methods for MailMessage Bcc AddRange

Question

When adding multiple recipients to a MailMessage.BCC there is no option for AddRange(). Only MailMessage.Bcc.Add();

Can this functionality be changed by an extension method? I'm a little lost at this point, any pointers would be very much appreciated.

Answer 1

Supposing you are talking about the System.Net.Mail.MailMessage class, what you need is already provided by the MailAddressCollection.Add method (Bcc is of the MailAddressCollection type).

Just call Add method with multiple e-mail addresses separated by a comma character (",").

Check this:

http://msdn.microsoft.com/en-us/library/ms144695(v=vs.100).aspx

Answer 2

MailMessage.Bcc is of type MailAddressCollection. This MailAddressCollection implements ICollection<MailAddress>. So what you can do, is write a generic AddRange extension method which applies to any ICollection<T>.

This will look like the following:

public static class CollectionExtensions
{
    public static void AddRange<T>(this ICollection<T> target, IEnumerable<T> items)
    {
        foreach(var item in items)
        {
            target.Add(item);
        }   
    }
}

You can then use this like so:

var address1 = new MailAddress("[email protected]");
var address2 = new MailAddress("[email protected]");
message.Bcc.AddRange(new[] { address1, address2 });