private void btnCareerIncrease_Click(object sender, EventArgs e)
        {
            int upgradeKarmaCost = _skill.UpgradeKarmaCost();

            if (upgradeKarmaCost == -1)
            {
                return; //TODO: more descriptive
            }
            string confirmstring = string.Format(LanguageManager.GetString("Message_ConfirmKarmaExpense", GlobalOptions.Language),
                                                 _skill.DisplayNameMethod(GlobalOptions.Language), _skill.Rating + 1, upgradeKarmaCost, cboType.GetItemText(cboType.SelectedItem));

            if (!_skill.CharacterObject.ConfirmKarmaExpense(confirmstring))
            {
                return;
            }

            cboType.Enabled = false;

            _skill.Upgrade();
        }