UWP 电子邮件消息换行符/换行符

我正在寻找一种在 UWP 应用中的EmailMessage()正文中添加换行符的方法。

我已经尝试过使用"'n"，'r'n，Environment.NewLine，<br>，<br />，并且每次无论是在桌面，移动设备还是两者上都被省略。我尝试使用Outlook和Gmail。

我正在使用 VS2015 更新 3。

谢谢。

编辑：这是代码

    public static async Task ComposeEmail(string address, string messageSubject, StorageFile attachmentFile)
    {
        var emailMessage = new EmailMessage();
        emailMessage.Subject = messageSubject;
        var lineBreak = Environment.NewLine;
        string body = lineBreak + lineBreak + lineBreak + lineBreak + lineBreak + lineBreak + textLoader.GetString("EmailPleaseDontCut") + lineBreak + Info.GetAllInfos();
        emailMessage.Body = body;
        if (attachmentFile != null)
        {
            var stream = Windows.Storage.Streams.RandomAccessStreamReference.CreateFromFile(attachmentFile);
            var attachment = new EmailAttachment(attachmentFile.Name, stream);
            emailMessage.Attachments.Add(attachment);
        }
        emailMessage.To.Add(new EmailRecipient(address));
        await EmailManager.ShowComposeNewEmailAsync(emailMessage);
    }

 EmailMessage emailMessage = new EmailMessage()
 {
       Subject = "App Feedback " + Package.Current.DisplayName + " " + ApplicationServices.CurrentDevice,
       Body = "First Line'r'nSecondLine" 
 };
 emailMessage.To.Add(new EmailRecipient() { Address = "admin@DotNetRussell.com" });
 await EmailManager.ShowComposeNewEmailAsync(emailMessage);