IO.ClickSend.ClickSend.Model.Email: To property not set

[JoLambrichts1977]

Hi,

I think there's a bug when using the IO.ClickSend.ClickSend.Model.Email class.
e.g.

var email = new IO.ClickSend.ClickSend.Model.Email
{
 To = new List<EmailRecipient> { new EmailRecipient("acorrectmailaddress@mail.com", "myName")},
 //... code removed for brevity
 };

I get the error:
System.IO.InvalidDataException: 'to is a required property for Email and cannot be null'