/// <summary>
        /// Handles the Click event of the btnAdd control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
        void btnAdd_Click(object sender, EventArgs e)
        {
            // Validate
            if (!_selectedItem.HasValue)
            {
                MessageBox.Show("You must select an item to add first.");
                return;
            }

            if (RequireDistinct)
            {
                if (lstItems.Items.Cast<CharacterTemplateInventoryItem>().Any(x => _selectedItem.HasValue && x.ID == _selectedItem.Value))
                {
                    MessageBox.Show("That item is already in the list.");
                    _selectedItem = null;
                    return;
                }
            }

            // Add
            var newItem = new CharacterTemplateInventoryItem(_selectedItem.Value, ItemChance.FromPercent(1f), 1, 1);
            lstItems.Items.Add(newItem);

            if (RequireDistinct)
            {
                _selectedItem = null;
                txtItem.Text = string.Empty;
            }

            // Select the new item
            lstItems.SelectedItem = newItem;
        }
        /// <summary>
        /// Handles the Click event of the btnAdd control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
        void btnAdd_Click(object sender, EventArgs e)
        {
            // Validate
            if (!_selectedItem.HasValue)
            {
                MessageBox.Show("You must select an item to add first.");
                return;
            }

            if (RequireDistinct)
            {
                if (
                    lstItems.Items.Cast <CharacterTemplateInventoryItem>().Any(
                        x => _selectedItem.HasValue && x.ID == _selectedItem.Value))
                {
                    MessageBox.Show("That item is already in the list.");
                    _selectedItem = null;
                    return;
                }
            }

            // Add
            var newItem = new CharacterTemplateInventoryItem(_selectedItem.Value, ItemChance.Percent100, 1, 1);

            lstItems.Items.Add(newItem);

            if (RequireDistinct)
            {
                _selectedItem = null;
                txtItem.Text  = string.Empty;
            }

            // Select the new item
            lstItems.SelectedItem = newItem;
        }
        /// <summary>
        /// Gets the string to draw for a list item.
        /// </summary>
        /// <param name="x">The list item.</param>
        /// <returns>The string to draw for a list item.</returns>
        static string GetDrawString(CharacterTemplateInventoryItem x)
        {
            var    t = ItemTemplateManager.Instance[x.ID];
            string item;

            if (t == null)
            {
                item = "ID " + x;
            }
            else
            {
                item = t.ID + ". " + t.Name;
            }

            var chance = string.Format("[{0:#,000.00}%] [{1} - {2}]", Math.Round(x.Chance.Percentage * 100, 2), x.Min, x.Max);

            return(chance + " " + item);
        }