1. var jack = new Person().SetName(“Jack”)
2.                                            .SetAge(30)
3.                                            .SetCity(“NY”)
4.                                            .Save();

Find out how it works here:
https://www.codeproject.com/articles/640997/fluent-interfaces-and-method-chaining-in-csharp

Project in ARToolkit for my Augmented Reality Interfaces course