public string PickUpItem(string[] args)
{
string characterName = args[0];
var character = party.FirstOrDefault(x => x.Name == characterName);
Validate.ValidateCharacter(character, characterName);
if (itemPool.Count == 0)
{
throw new InvalidOperationException(OutputMessages.EmptyPool());
}
character.ReceiveItem(itemPool.Peek());
return(string.Format(OutputMessages.PickedUpItem(), characterName, itemPool.Pop()));
}