private void ButtonAdd_Click(object sender, EventArgs e)
        {
            ConnectionManager connectionManager = new ConnectionManager();
            String            result            = connectionManager.AddAlteration(
                (double)numericUpDownAmount.Value,
                this.type,
                radioButtonRepeated.Checked,
                dateTimePickerDate.Value
                );

            MessageBox.Show(result);
            ButtonBack.PerformClick();
        }
        private void ButtonAddCost_Click(object sender, EventArgs e)
        {
            ConnectionManager connectionManager = new ConnectionManager();
            double            amount            = double.Parse(textBoxCost.Text);

            connectionManager.AddAlteration(
                amount,
                FundsAlterationTypes.EXPENSE,
                radioButtonRepeated.Checked,
                dateTimePickerCost.Value
                );
            ButtonBack.PerformClick();
        }
        private void ButtonAddIncome_Click(object sender, EventArgs e)
        {
            ConnectionManager connectionManager = new ConnectionManager();
            double            amount            = (double)numericUpDownIncome.Value;

            connectionManager.AddAlteration(
                amount,
                FundsAlterationTypes.INCOME,
                radioButtonRepeated.Checked,
                dateTimePickerIncome.Value
                );
            ButtonBack.PerformClick();
        }