Recommend Adding Introduction section of C# for Python Programmers to Class 1 Prep

[jshagouv]

Perhaps I missed it, but I didn't see a step that involved reading the Intro as part of Class 1 prep. However, when reading Data Types, reference was made to having already dissected the public static void Main(string[] args) line, which was something I hadn't come across; I found it in the Intro, though.