Added .NET framework book (#8520)

* Update free-programming-books-langs.md

Added Q# lanaguge used for developing quantum algorithms on Azure

* Update free-programming-books-langs.md

Changed referencing of Q# to avoid the conflict of # symbol

* Update free-courses-en.md

Added class central

* Added .NET framework book

* Update free-programming-books-langs.md

Added PDF

* Update free-programming-books-langs.md

* Update free-programming-books-langs.md

books/free-programming-books-langs.md

@@ -309,6 +309,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Diving into ASP.NET WebAPI (2016)](https://github.com/akhilmittal/FreeBooks/) - Akhil Mittal (PDF)
 * [Intro to ASPNET MVC 4 with Visual Studio 2011 Beta (2012)](http://download.microsoft.com/download/0/f/b/0fbfaa46-2bfd-478f-8e56-7bf3c672df9d/intro%20to%20asp.net%20mvc%204%20with%20visual%20studio%20-%20beta.pdf) - Rick Anderson, Scott Hanselman (PDF)
 * [Introducing ASP.NET Web Pages 2 (2012)](https://download.microsoft.com/download/0/F/B/0FBFAA46-2BFD-478F-8E56-7BF3C672DF9D/Introducing%20ASP.NET%20Web%20Pages%202.pdf) - Mike Pope (PDF)
+* [.NET Framework Notes for Professionals](https://books.goalkicker.com/DotNETFrameworkBook/DotNETFrameworkNotesForProfessionals.pdf) - Compiled from StackOverflow Documentation (PDF)
 
 
 ### ASP.NET Core
@@ -1098,7 +1099,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 
 ### JavaScript
 
-* [Airbnb JavaScript Style Guide() {](https://airbnb.io/javascript/) - Airbnb (HTML)
+* [Airbnb JavaScript Style Guide](https://airbnb.io/javascript/) - Airbnb (HTML)
 * [Basic JavaScript for the impatient programmer](http://www.2ality.com/2013/06/basic-javascript.html) - Dr. Axel Rauschmayer (HTML)
 * [Book of Modern Frontend Tooling](https://github.com/tooling/book-of-modern-frontend-tooling) - Various (HTML)
 * [Building Front-End Web Apps with Plain JavaScript](https://web-engineering.info/JsFrontendApp-Book) - Gerd Wagner (HTML,PDF)