Every C# Dev Uses Monads. Most Don't Know.

C# developers use monads daily without realizing it. IEnumerable, Func, Task, and nullable types are all proper monads built into the language. The core monadic operations — unit (lifting a value), bind (chaining operations), and map (applying non-monadic functions) — map directly to familiar C# constructs: SelectMany is bind for IEnumerable, await is syntactic sugar for bind on Task, and the null-propagation operator (?.) is map on nullable types. The post also walks through implementing a complete monad for nullable reference types in C#, adding bind, map, and match operations to demonstrate how monadic patterns enable composable, null-safe pipelines using ordinary business functions that know nothing about monads.