Passing List variable as a parameter

CodeSample.cs

void Main()
{
  // I don't like this variable. It has a very short "life"
	List<string> monsterThings = new List<string>();
	monsterThings.Add("Thing 1");
	monsterThings.Add("Thing 2");
	monsterThings.Add("Thing 3");
	
	Monster myMonster = new Monster("Snake", monsterThings);
}

// My preference
void Main2()
{
	Monster myMonster = new Monster("Snake");
	myMonster.Things.Add("Thing 1");
	myMonster.Things.Add("Thing 2");
	myMonster.Things.Add("Thing 3");
}

// My real preference
void Main3()
{
	Monster myMonster = new Monster("Snake");
	myMonster.AddThing("Thing 1");
	myMonster.AddThing("Thing 2");
	myMonster.AddThing("Thing 3");
}

public class Monster
{
	public string Name { get; set;}
	public List<string> Things {get; set;}
	
	public Monster(string name, List<string> things)
	{
		Name = name;
		Things = things;
	}
	
	// My preference
	public Monster(string name)
	{
		Name = name;
		Things = new List<string>();
	}
	
	// Even better - so we can potentially add more code to do things like
	// 1. Ensure this isn't a duplicate "thing"
	// 2. Only allow "thing" values that contain letters (and not numbers)
	// 3. Raise other event notifications
	public void AddThing(string thing)
	{
		Things.Add(thing);		
	}
}