Part of the latest version of .NET compilers is nullable reference types where you can declare a string as a Nullable type to indicate whether you intend for it to be able to store a null value.
This site details how to get it working in C#, but there's no reference to VB.NET in it: Tutorial: Migrate existing code with nullable reference types
I am trying to get this working on an ASP.NET MVC 5 project using VB.NET, but I have been unable to. How does one do this, or is this just available in C#?