private void showConfirmationPopUp(object sender, EventArgs e)
        {
            _getDataAmount    = _firstNumber.Text + _decimalPointVisibility.Text + _secondNumber.Text + _thirdNumber.Text + _fourthNumber.Text;
            _dataAmountDouble = Double.Parse(_getDataAmount);
            _getDataUnit      = _dataUnitsToGB.Text;

            try
            {
                _transferAmount = _dataAmountDouble;
                if (_getDataUnit == StringConstants.Localizable.MBUnit)
                {
                    _transferAmount = _dataAmountDouble / 1000.0;
                }

                if ((Controller._userLoggedIn.Allocated - Controller._userLoggedIn.Used) >= _transferAmount && _transferAmount != 0)
                {
                    Dialog transferDialog = DialogHelper.ConfirmTransfer(this, _dataAmountDouble.ToString(), _getDataUnit, _selectedUser.Text, TransferDataAsync);
                    transferDialog.Show();
                }
                else if (_transferAmount == 0)
                {
                    Dialog zerAmountDialog = DialogHelper.ZeroAmount(this);
                    zerAmountDialog.Show();
                }
                else
                {
                    Dialog transferAmountDialog = DialogHelper.TransferAmount(this);
                    transferAmountDialog.Show();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Dialog selectUserDialog = DialogHelper.SelectUser(this);
                selectUserDialog.Show();
            }
        }