BackgroundProcesses.Reminder.MessageSender C# (CSharp) Method

        private static async void MessageSender(string contactNumber)
        {
            if (_device == null)
            {
                try
                {
                    _device = SmsDevice2.GetDefault();
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex);
                    return;
                }

            }
            //if (_device == null) return;

            var msg = new SmsTextMessage2
            {
                To = contactNumber,
                Body = "I am in need of help. My coordinates are\n Latitude:" + _latitude + "Longitude \n" + _longitude
            };
            var result = await _device.SendMessageAndGetResultAsync(msg);

            if (!result.IsSuccessful) return;
            var msgStr = "";
            msgStr += "Text message sent, To: " + _phonenumber;
            var msg1 = new MessageDialog("Message Sent!" + msgStr);
            await msg1.ShowAsync();
        }