It is a common fact that the .NET object model, as well as other software program platforms, allow comparing objects by reference and by value.
By default, two objects are equal if the corresponding object variables have the same reference. Otherwise, they are different.
However, in some cases, you may need to state that two objects belonging to the same class are equal if their content match in a certain way.
Assume we have the Person class, which contains some personal data – First Name, Last Name, and Birth date.
Consider the following points:
- What is the minimum required number of class modifications to assure comparing class objects by values with the help of the standard .NET architecture?
- What is the minimum required number of class modifications to assure comparing class objects by values (every time, if not explicitly stated that objects may be compared by a reference) with the help of the standard .NET architecture?
For each case, we will see the best way to compare objects by value to get a consistent, compact, copy-paste free, and productive code. It is not as trivial as it may seem for the first time.