System.Lazy in C#

During a work task, I was asked to manage the loading of an object just once in its first usage.

It is something that I have had several times throughout my career. But I always did the same way, manually with an “if null” verification.

However, there is a class that has existed in .NET since version 4.0, in 2010, called Lazy.

The funny thing is that until a few days ago, I never considered this possibility until I realized it during web research.

Here is an example of the normal handling:

And here, the same code, using Lazy:

Another advantage is that it has the safe-thread option embedded, just passing true as a second parameter:

And it is also a great option to work with the Singleton pattern: