Question

I’m having a little problem and I don’t see why, it’s easy to go around it, but still I want to understand.

I have the following class :

public class AccountStatement : IAccountStatement {      public IList<IAccountStatementCharge> StatementCharges { get; set; }      public AccountStatement()     {         new AccountStatement(new Period(new NullDate().DateTime,newNullDate().DateTime), 0);     }      public AccountStatement(IPeriod period, int accountID)     {         StatementCharges = new List<IAccountStatementCharge>();         StartDate = new Date(period.PeriodStartDate);         EndDate = new Date(period.PeriodEndDate);         AccountID = accountID;     }       public void AddStatementCharge(IAccountStatementCharge charge)     {         StatementCharges.Add(charge);     } 

}

(note startdate,enddate,accountID are automatic property to…)

If I use it this way :

var accountStatement = new AccountStatement{                                               StartDate = new Date(2007, 1, 1),                                               EndDate = new Date(2007, 1, 31),                                               StartingBalance = 125.05m                                            }; 

When I try to use the method ‘AddStatementCharge: I end up with a ‘null’ StatementCharges list… In step-by-step I clearly see that my list get a value, but as soon as I quit de instantiation line, my list become ‘null’

Answer 1

This code:

public AccountStatement() {     new AccountStatement(new Period(new NullDate().DateTime,newNullDate().DateTime), 0); } 

is undoubtedly not what you wanted. That makes a second instance of AccountStatement and does nothing with it.

I think what you meant was this instead:

public AccountStatement() : this(new Period(new NullDate().DateTime, new NullDate().DateTime), 0) { }