.NET 8 New Features with Code Examples

.NET 8 New Features with Code Examples

Devnot - Dotnet Konferansı 2024
25.05.2024
Sheraton Grand Ataşehir, İstanbul

Transcript

1. .NET 8 New Features with Code Examples Mert Metin D E V N O T D O T N E T K O N F E R A N S I 2 0 2 4
2. Mert Metin - Senior Software Engineer A B O U T M E mrtmtn _mertmetin mertmtn Blogcu Mühendis - Blogger QR to reach me
3. 01 02 03 Performance Improvements Keyed DI Services C# 12 - Primary Constructors - Collection Expressions - Spread Operator - Data Annotations - Default Values in Lambda Exp. - Exprerimental - Random.GetItems - Shuffle - Alias Any Type Enhanced Feature for .NET Dependency Injection Agenda - FrozenSet - CompositeFormat - SearchValues<T> - Benchmark Results* of the Improvements *All results have created by BenchmarkDotnet tool
4. Primary Constructors - Simple class creation - Looks like method parameter Primary Constructor Typical constructor before C# 12
5. - Useful for dependency injection based projects - Reduces code lines - Increases readability
6. Collection Expressions Initialization and defining operations are more concise and clear.
7. Spread Operator Merge, clone, extend collections with two dots (..) Reminds us of Javascript
8. Data Annotations Added new attributes Length Range AllowedValues DeniedValues Base64String
9. Default Values in Lambda Exp. Before C# 12 default parameter Current Output
10. Experimental Attribute An attribute which specifies as experimental feature on method or class Belongs to System.Diagnostics.CodeAnalysis
11. Experimental Attribute Suppress the warnings Source Code Using Pragma Blocks
12. Random.GetItems<T> Selects a specific number of items from a given set of elements randomly Drawback is; Resulting random collection can include duplicate entries. . Output Unexpected Output
13. Random.GetItems<T> Flagging mechanisim using dictionary to avoid duplications
14. Shuffle Performs an in-place shuffle of an array. Useful in some cases; machine learning, gambling, online exam Belongs to Random class
15. Shuffle - Code Examples
16. Alias Any Type Creating custom type with “using” keyword. “global using” are required for using everywhere
17. Keyed DI Services - Naming services with key. - Same service - different named services or different lifetimes Key, could be string or enum type Program.cs service declaration
18. Keyed DI Services - Usages FromKeyedServices - Given key implemented on ActionMethod Program.cs service declaration
19. Factory Method Implementation
20. FrozenSet<T> - Frozen means immutable - Impossible to manipulation - add,clear,remove operations
21. FrozenSet<T> Benchmark Results - Slower creation because of modification the set - Faster lookup or reading because of immutable set
22. CompositeFormat Allows to parse a composite format string once and reuse this instance multiple times. This approach significantly enhances performance, when the format string has created dynamically but used repeatedly.
23. SearchValues Optimized in scenarios where the same set of values is frequently used for searching at runtime. Currently, only byte and char supported “String list” will be overloaded in .NET 9
24. int.ToString() Benchmark Results of the Improvements
25. Benchmark Results of the Improvements string.Replace()
26. .NET Release Cadence
27. QR to reach me Thanks for listening QR to slide