LINQ statement returns rownumber / Line Number Into Linq Query Results

Scenario:
data:
First
Second
Third
I like to display it as:
1. First
2. Second
3. Third
Solutions:
 

var list = new List<string>{
        "First","Second","third"
      };
      var query = (from s in list
                   select s)
        .Select((obj, index) => index + ". " + obj);

      foreach (string s in query)
        Console.WriteLine(s);

2.

static void Main(string[] args)
        {
            string[] nums = {"One","Two", "Three"};

            int X = 0;
            var q = (from a in nums select new {ID = IncrementX(ref X), num = a});

            foreach (var a in q)
            {
                Console.WriteLine (a.ID.ToString() + ", " + a.num);
            }
            Console.ReadLine();
        }

        static int IncrementX(ref int X)
        {
            X+=1;
            return X;
        }

Example:

var query = from s in entities.Scores
                    where s.Game.Id == guid
                    orderby s.PlayerScore descending
                    select new
                    {
                        PlayerName = s.PlayerName,
                        PlayerScore = s.PlayerScore
                    };

        var list =  query.AsEnumerable() 
                    .Select((player, index) => new ScoreWithRank()
                            {
                                PlayerName = player.PlayerName,
                                PlayerScore = player.PlayerScore,
                                Rank = index + 1;
                            }
                    .ToList();
listBox.ItemsSource = list.Select((player, index) => new 
                            {
                                PlayerName = player.PlayerName,
                                PlayerScore = player.PlayerScore,
                                Rank = index+=1
                            }).ToList();