1. Introduction
2. Using Record Types
3. Using Global Usings
4. Using Raw String Literals
5. Using File-Scoped Namespaces
6. Using Required Members
7. Using is not for Pattern Matching
8. Using Extended Property Patterns
9. Using Init-only Setters
10. Using Generic Attributes
11. Using Primary Constructors for Non-Record Types
12. Using Target-typed New Expressions
13. Using Nullable Reference Types
14. Using string interpolation for Concatenation
15. Using the using Keyword to Manage Resources
16. Using var for Implicit Variable Declaration
17. Using async and await for Asynchronous Programming
18. Using Auto-Implemented Properties
19. Using LINQ for Data Manipulation
20. Using Lambda Expressions with Delegates
21. Using Action to Execute Methods with Parameters
22. Using Func for Methods with Return Values
