UpdateScoreWithPenalty

       private static void UpdateScoreWithPenalty(ref int PlayerScore, string PlayerTiles, Dictionary<char, int> tileDictionary)
       {
           for (int Count = 0; Count < PlayerTiles.Length; Count++)
           {
               PlayerScore = PlayerScore - tileDictionary[PlayerTiles[Count]];
           }
       }

The UpdateScoreWithPenalty they use a for loop to update the score. In the "for (int Count = 0; Count < PlayerTiles.Length; Count++)" increases the value of count by 1. In "PlayerScore = PlayerScore - tileDictionary[PlayerTiles[Count]];" this finds the value of the player tiles from the tileDictionary and takes them away from the player score to get the final sum of that round.