The letter „U” in CRUD means Update. Is that something hard to do in our applications? Of course not! We simply get some data, change the value of selected columns and save our changes. That’s it. However, sometimes thing may not go so smooth, especially when we (as programmers) wouldn’t predict some edge-case scenarios. One of this is updating same data by many users at the same time. That’s why today’s post will be dedicated to the concept of optimistic concurrency and implementing that using Entity Fr...