wp8.1 app调用outlok邮箱反馈

开发wp8.1 app 添加邮箱反馈功能，using Windows.ApplicationModel.Email; 方法如下

 private async void SendEmailTask()
        {
            var emailMessage = new EmailMessage();
            emailMessage.Subject = "subject";
            emailMessage.Body = "body";
            emailMessage.To.Add(new EmailRecipient("emailAddress"));
            await EmailManager.ShowComposeNewEmailAsync(emailMessage);
        }