C#•2y ago

❔ Polymorphism

Can someone help me understand this part of the code? I dont understand why its being written like this...

public class BankBranch
   {
      //
      // This field keep a list of bank accounts.
      // Any type of accounts will be accepted
      // 
      private List<Account> _accounts;

      public BankBranch(string name)
      {
         Name = name;
         _accounts = new List<Account>();
      }

      // Auto-properties
      public string Name { get; set; }

public class BankBranch
   {
      //
      // This field keep a list of bank accounts.
      // Any type of accounts will be accepted
      // 
      private List<Account> _accounts;

      public BankBranch(string name)
      {
         Name = name;
         _accounts = new List<Account>();
      }

      // Auto-properties
      public string Name { get; set; }

10 Replies

moshimoshiOP•2y ago

E.g., why do we have to use property function if field is set to public?

Pobiega•2y ago

You only have one field here, and its private. you have one property, and its public

moshimoshiOP•2y ago

isnt these the fields

private List<Account> _accounts;
public BankBranch(string name)
      {
         Name = name;
         _accounts = new List<Account>();
      }

private List<Account> _accounts;
public BankBranch(string name)
      {
         Name = name;
         _accounts = new List<Account>();
      }

and this the property?

 public string Name { get; set; }

 public string Name { get; set; }

Pobiega•2y ago

private List<Account> _accounts; is a field

public BankBranch(string name)
      {
         Name = name;
         _accounts = new List<Account>();
      }

public BankBranch(string name)
      {
         Name = name;
         _accounts = new List<Account>();
      }

moshimoshiOP•2y ago

oh my bad! i just realized

Pobiega•2y ago

is a constructor

moshimoshiOP•2y ago

can I ask, why dont the account field go into the constructor's args?

Pobiega•2y ago

It could! Depends on how you want it to work. In this case, it always creates a new, empty list when a branch is constructed.

Anton•2y ago

you could do that, but this class is assumed to own the state, so giving it a mutable list could lead to unexpected things

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Polymorphism