Why does everyone hate nulls?_

Hot take: in business code, just throw ArgumentNullException at the top of every public method. Fail fast, fail loudly. The nullable annotations are great but retrofitting them onto a 500k-line codebase is a months-long project nobody will ever approve.

In functional languages you use Option<T> / Maybe<T> instead of null. There are C# libraries like LanguageExt that bring this pattern over. You get compiler-enforced exhaustive handling instead of hoping nobody forgot a null check.

Enable <Nullable>enable</Nullable> in your .csproj and treat every warning as an error. After a few weeks of pain it becomes second nature and your code gets dramatically safer. The ?. and ?? operators do most of the heavy lifting. string? name = GetName(); var display = name ?? "Anonymous";

Tony Hoare introduced null references in ALGOL W back in 1965 and later called it his billion-dollar mistake. C# 8 introduced nullable reference types to help, but I still see NullReferenceException in every codebase I touch. Are we just bad at using the tools, or is null fundamentally broken?