c# - NullReferenceExceptionUnhandled -

I write a blackjack program but my problem is that when creating an object that contains a list of other objects, But when I make an item for the first time, the list is empty. I think this is the reason why I am getting this error below is my code where I initialize a player as an example of a hand in the player's constructor, but when I try the method player HD If I call, "Obvious reference is not set for an example of an object" error message;

  public class player {name of private string; Public hand player hand Public player () {} public player (string name) {this.Name = name; This.playerHand = New Hand (); } Public string name {get {return name; } Set {name = value; }} Public Zero Tech Card (Card Card) {playerHand.Hit (Card); } `  
`  
  public class hands {public list & lt; Cards & gt; hand; Public hand () {hand = new list & lt; Cards & gt; (); } Public Entity Hand Values; `Public Zero Hits (Card Card) {Hands. Add (card); } Public int handvalue () {foreach (handheld card card) handValue + = (int) card.value; Return hand}} public class games {public game (IEnumerable & lt; string & gt; player name) {list & lt; Player & gt; Player = new list & lt; Player & gt; (); Players (name of string in player names) Add (new player (name)); Player Dealer = New Dealer (); Players.Add (dealer); Deck playing deck = new deck (); Deal (sports, player); Play (deck, player); DisplayResults (players); } Public Zero Deal (deck deck, list & gt; player & gt; player) {deck.Shuffle (); For (Int i = 1; i & lt; 3; i ++) Forac (player player player player). TechCard (DeckDial ()); }    
 
 
 Your line is:  
  Dealer = new dealer ();   
 You did not show the code to us for  dealer , but it is clear from the code that  dealer: player  note that  Your default constructor for player  never starts  Player.playerHand . If the default constructor for  dealer  calls the default constructor for the  player  (and it is by default), then the  playerHand  will be <  Dealer  for code> null .  
 So, my guess is that  playerHand.Hit (card);  is giving you  NullReferenceException  when used for  dealer , because you have never played the  player. Player Player .  
 To fix this, just provide a launcher  
  public hand playerhand = new hand (); Remove the line related to   
 and the constructor  player .  
 Finally, and it's a  on one side , you have many  public  variables in your classes, you're "leaking" the variable, The name of the game, which can modify your class's consumer without restraint and dispel your anomalies.