Suggestion to change properties on EmailMessage...

[ctolkien]

Which implement IEnumerable<T> to ICollection<T> with new'd up empty collections on instantiation.

Rationale; typical current usage:

var message = new EmailMessage
{
    To = new List<EmailMessage> { new EmailAddress { Email = "[email protected]" } }
}

Versus new API available...

var message = new EmailMessage
{
    To.Add(new EmailAddress { Email = "[email protected]" })
}

It's shorter, more succinct and in my opinion, just nicer.

This is technically a breaking change if someone is using a collection type which implements IEnumerable<T> but not ICollection<T>. All the code I've seen both in samples and in the wild always seems to use List<T>, which does implement ICollection<T>.

This should be expanded not just the To address but to any other collection type, and probably looked at beyond EmailMessage.

Thoughts?