The delegating handler in WebAPI is the most basic mechanism to intercept HTTP message lifecycle. We can find a very clear and useful visualisation of on WebAPI poster. We can see that message handlers is the first place in HTTP request processing which is able to read of modify the message. It is many cases when we would need to place some code before request will be executed and after. But first, we will introduce how to write that kind of handlers.
Entity Framework change tracking optimization Data changes tracking Entity Framework gives us an opportunity to work with data without bothering to notify database about entity changes made during data processing. EF provides few methods of tracking this modifications. Snapshot change tracking By default in Entity Framework it is enabled snapshot change tracking mechanism. It works by saving entity states each time when it is loaded from the database. When for example SaveChanges method is called, Entity Framework scans all entities…