Equality - Exercises
The following exercises will focus on implementation of proper equality between two objects.
The first equality implementation when comparing two objects is to override the
Implement the required code to ensure that the comparison will return true when two users have the same first name, last name and date of birth.
Note: Don't forget to make sure that your code can handle comparisons with
null or other types correctly
You can use the
Object.ReferenceEquals(object a, object b) method to do reference comparisons
.Equals() method has been overridden properly, implementing custom logic for the
!= operators is a good practice to have consistent equality.
Add an implementation of the
!= operator to the class to support the proper comparison.
Make sure that you implement both operators, or the code will not compile.
Reminder: the operator implementation declaration is
public static bool operator == (User left, User right)
GetHashCode() method is used by the .Net Framework to do comparison of objects when working with hash-based collections (i.e.
If you override the implementation of
.Equals() you should make sure that the
.GetHashCode() method is also overridden.
Add a custom implementation of
.GetHashCode to our
Reminder: the method override declaration is
public override int GetHashCode()