In a nutshell

In a nutshell

Allows to delegate null checking to the service class instead of the client, avoiding null checks everywhere an instance is accessed. In essence is a Strategy pattern but with a very specific purpose.

Some advantages

• Avoid Cascading Nulls syntax to write less obfuscated code
• Reduces complexity in client calls specially when chaining many (?) operators

Anti patterns

• IsNull property anti-pattern, defeats the purpose of the pattern

Reference:

McLean, H. G. (2017). Adaptive Code: Agile coding with design patterns and SOLID principles, 2nd Edition. Microsoft Press