[Samples] Improve Composition vs Inheritance sample

Author: florinc

LessonsSamples/LessonsSamples/Lesson7/CohesionCoupling/PageXml.cs

@@ -5,12 +5,16 @@ namespace LessonsSamples.Lesson7.CohesionCoupling
     public class PageXml
     {
         public CustomerXml Customer { get; set; }
+
+        //.... other properties that describe the XML format of a page w/ customer data
     }
 
     public class CustomerXml
     {
         public string Name { get; set; }
         public List<AddressXml> Addresses { get; set; }
+
+        //.... other properties that describe the XML format of a customer
     }
 
     public class AddressXml

LessonsSamples/LessonsSamples/Lesson7/InheritanceComposition/Account.cs

@@ -29,15 +29,13 @@ public decimal MonthlyInterest()
             return amount*interestRate/100;
         }
 
-        public virtual void MonthlyRenewal()
+        public virtual void MonthlyRenewal(Month currentMonth)
         {
 			decimal interest = MonthlyInterest();
-	        decimal taxes = CalculateTaxesForMoth(CurrentMonth);
+	        decimal taxes = CalculateTaxesForMoth(currentMonth);
 
 	        amount = amount + interest - taxes;
         }
-
-	    public Month CurrentMonth { get; set; }
     }
 
 	class SavingsAccount : Account
@@ -96,10 +94,10 @@ public AutoLoanAccount(decimal interestRate) : base(interestRate)
         {
         }
 
-        public override void MonthlyRenewal()
+        public override void MonthlyRenewal(Month currentMonth)
         {
 	        decimal interest = MonthlyInterest();
-	        decimal taxes = CalculateTaxesForMoth(CurrentMonth);
+	        decimal taxes = CalculateTaxesForMoth(currentMonth);
 
 	        Amount = Amount - interest - taxes;
         }