Using the Option Module in F#

"In Object-Oriented Programming, it is not uncommon to encounter null values, which can lead to null reference errors. Despite the existence of extensive code to mitigate these errors, they still persist in C# code bases.

On the other hand, in functional programming, null values are not typically utilized. Thanks to immutability, we can rely on values to always contain something. In cases where null values are expected at the boundaries of our system or when we anticipate the absence of a value, we have effective mechanisms to handle such situations.

The secret weapon F# uses for dealing with null value is the option type which is basically a Discriminated Union:"