Refactoring Day 5 : Pull Up Field

Today we look at a refactoring that is similar to the Pull Up method. Instead of a method, it is obviously 
done with a field instead! 
 1: public abstract class Account 
 2: { 
 3: } 
 4: 
 5: public class CheckingAccount : Account 
 6: { 
 7: private decimal _minimumCheckingBalance = 5m; 
 8: } 
 9: 
 10: public class SavingsAccount : Account 
 11: { 
 12: private decimal _minimumSavingsBalance = 5m; 
 13: } 
 
In this example, we have a constant value that is duplicated between two derived classes. To promote 
reuse we can pull up the field into the base class and rename it for brevity. 
 1: public abstract class Account 
 2: { 
 3: protected decimal _minimumBalance = 5m; 
 4: } 
 5: 
 6: public class CheckingAccount : Account 
 7: { 
 8: } 
 9: 
 10: public class SavingsAccount : Account 
 11: { 
 12: }