This part of the book is about the C# language—the grammar and vocabulary that you will use every day to write the source code for your applications.
Programming languages have many similarities to human languages, except that in programming languages, we can make up our own words, just like Dr. Seuss!
In a book written by Dr. Seuss in 1950, If I Ran the Zoo, he states this:
And then, just to show them, I'll sail to Ka-Troo And Bring Back an It-Kutch a Preep and a Proo A Nerkle, a Nerd and a Seersucker, too!
This book covers C# 7.1. Microsoft has plans for future versions of C#, as shown in the following table:
| Version | Features |
| C# 7.2 | ref readonly, blittable, strongname, interior pointer, nontrailing named arguments, private protected, Digit separator after base specifier |
| C# 7.3 |
Range with double-dot operator, for example, 1..10
|
| C# 8.0 | Default... |
