Send an Email on IOS Platform

Question

I'm trying to add email capability to my IOS project made with Xamarin Forms. I'm using DependencyService to implement the email function and my IOS code is as follows:

public void SendEmail(string[] recipients, string subject, string body, string filePath, string fileName)
    {
        MFMailComposeViewController mailController;

        if (MFMailComposeViewController.CanSendMail)
        {
            mailController = new MFMailComposeViewController();

            mailController.SetToRecipients(recipients);
            mailController.SetSubject(subject);
            mailController.SetMessageBody(body, false);
            mailController.AddAttachmentData(NSData.FromFile(filePath), "application/pdf", fileName);
            mailController.Finished += (object s, MFComposeResultEventArgs args) =>
            {
                Console.WriteLine(args.Result.ToString());
                args.Controller.DismissViewController(true, null);
            };

            UIApplication.SharedApplication.KeyWindow.RootViewController.PresentViewController(mailController, true, null);
        }
    }

but when I test the implementation, nothing happens no errors or anything. I can continue to use the app as normal after the failed attempt to email. I understand this question has been asked here and here but I have already enabled an email account on my testing iPad's default mail app and have removed all instances of DisplayActionSheet in my PCL implementation.