Eat function from Rogue C#

rogue-eat

private bool Eat(char? ListItem)
{
    bool retValue = false;
    List<Inventory> items;

    if (!InvDisplay)
    {
        // Verify the player has something they can eat.
        items = (from inv in CurrentPlayer.PlayerInventory
                    where inv.ItemCategory == Inventory.InvCategory.Food
                    select inv).ToList();

        if (items.Count > 0)
        {
            // If there's something edible, show the inventory
            // and let the player select it.  Set to return and exit.
            DisplayInventory();
            cStatus = "Please select something to eat.";
            ReturnFunction = Eat;
        }
        else
            // Otherwise, they'll be hungry for awhile.
            cStatus = "You don't have anything to eat.";
    }
    else
    {
        // Get the selected item.
        items = (from InventoryLine in 
             Inventory.InventoryDisplay(CurrentPlayer.PlayerInventory)
                    where InventoryLine.ID == ListItem
                    select InventoryLine.InvItem).ToList();

        if (items.Count > 0)
        {
            // Call the appropriate delegate and remove the item
            // from inventory.
            items[0].MainFunction(CurrentPlayer, items[0]);
            CurrentPlayer.PlayerInventory.Remove(items[0]);
            RestoreMap();
            retValue = true;
        }
        else
        {
            // Process non-existent option.
            cStatus = "Please select something to eat.";
            RestoreMap();
            retValue = false;
        }
    }

    return retValue;
}