LINQ in C# makes code very declarative, not only reducing the line count by half but also making it obvious what the code does. Code like persons.Where(x=>x.age

LINQ in C# makes code very declarative, not only reducing the line count by half but also making it obvious what the code does. Code like persons.Where(x=>x.age>21).OrderBy(x=>x.Name).ToList(); doesn’t need a comment to spell out what it does, but imperative code might. Being able to easily create types as needed gives not only compiler guarantees but also communicates exactly what sort of “id” or “name” you’re dealing with. Generics separate orthogonal parts of logic, e.g. a List vs domain object. I remember the days when the domain objects would contain the “next” pointer. More generally any ability to separate aspects is hugely helpful. Eg: list<lazy<person>> is a lot easier to read than baking it all that in one object. Once done, you don’t have to have a section of code inside person that says “instantiate these fields lazily for performance”.