使用MvcMailer发送多封电子邮件

我正在开发一个MVC 3项目，并希望每个月通过电子邮件向客户发送发票。我该如何发送这些多封邮件，如果是一个循环，我该如何编写这个循环?

这是我的InvoiceMailer代码:

    public virtual MailMessage InvoiceMailed()
    {
        var invoices = db.Invoice.FirstOrDefault();
        var client = db.Clients.FirstOrDefault();

        var mailMessage = new MailMessage{Subject = "InvoiceMailed"};
        mailMessage.To.Add("amecily@gmail.com");
        mailMessage.Bcc.Add(client.EmailAddress);
        ViewBag.Name = client.FullName;
        ViewBag.Number = invoices.InvoiceNumberID;
        ViewBag.Amount = invoices.InvoiceAmount;
        ViewBag.Month = invoices.InvoiceMonth;
        PopulateBody(mailMessage, viewName: "InvoiceMailed");
        return mailMessage;
    }

和我的电子邮件的视图:

Hello @ViewBag.Name
<br /><br />
This is your invoice from DFP Productions for the month of @ViewBag.Month
<br /><br />
@ViewBag.Number<br />
@ViewBag.Amount<br />
@ViewBag.Month<br />

电子邮件目前正在发送，但显然只有一组信息，只发送给三个收件人中的两个(这是由于FirstOrDefault，我应该用什么代替?)

谢谢,艾米