Deduct points from score if invalid word entered

Under HaveTurn, you'll see this bit of code:

if (!ValidWord)

                   {
                       Console.WriteLine();
                       Console.WriteLine("Not a valid attempt, you lose your turn.");
                       Console.WriteLine();
                   }

You can deduct a number of points from the player's score by adding one line:

if (!ValidWord)

                   {
                       Console.WriteLine();
                       Console.WriteLine("Not a valid attempt, you lose your turn.");
                       PlayerScore = PlayerScore - 10;
                       Console.WriteLine();
                   }