As addition to other answers, @JsonProperty annotation is really critical if you use the @JsonCreator annotation in lessons which would not have a no-arg constructor. MaartenMaarten 23k33 gold badges5151 silver badges6969 bronze badges Insert a comment . To summarize, a WPF software has two levels: the data layer (the DataContext) https://maxestatessector36a.home.blog/2025/03/28/trump-towers-2-pinnacle-of-gurgaon-luxury/