private void buttonAdd_Click(object sender, EventArgs e)
        {
            try
            {
                Prize prize = new Prize(
                    int.Parse(textBoxPrizeId.Text),
                    textBoxPrizePlaceName.Text, decimal.Parse(textBoxPriceAmount.Text),
                    double.Parse(textBoxPrizePercentage.Text),
                    FormMenu.selectedTournament);

                Prize.AddData(prize);

                MessageBox.Show("Prize has been saved", "information");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Prize cannot be saved. Error Message: " + ex.Message, "Error");
            }
        }