public void PrintAllPlayers()
        {
            Championship c = new Championship();

            foreach (var player in c.Players)
            {
                Console.WriteLine("Name: " + player.PlayerName + " EnrollmentDate: " + player.PlayerEnrollmentDate);
            }
        }
        static void Main(string[] args)
        {
            using (var ctx = new Championship())
            {
                Player player = new Player()
                {
                    PlayerName = "Ivan Prgomet", PlayerEnrollmentDate = DateTime.Now
                };

                ctx.Players.Add(player);
                ctx.SaveChanges();
            }
        }