> No one seems to know why C# behaves the way it does. Operators are lifted[0] over nullability in C#. Every value type T can be converted implicitly to Nullab

> No one seems to know why C# behaves the way it does. Operators are lifted[0] over nullability in C#. Every value type T can be converted implicitly to Nullable<T>. When `10 * null` is typechecked, both sides of * are typed as Nullable<T>. The * operator then acts like the pseudo-Haskell (*) <$> 10 <*> null or, I guess liftA2 (*) (Just 10) Nothing The semantics of Nullable<T> are similar to those of an optional type, with some implicit mapping and lifting. In that context, null acts less like null. (Thanks to convenient conversions.) Note that the following doesn't throw: int? value = null; value.HasValue // == false [0]: https://blogs.msdn.microsoft.com/ericlippert/2007/06/27/what-exactly-does-lifted-mean/ https://blogs.msdn.microsoft.com/ericlippert/2007/06/27/what...