Technology mix: Magical C# 9 - something positive in 2020?

on YouTube ↗19m

" summary

C# 9 arrives alongside .NET 5 (release candidate now, GA expected November 2020) and adds concrete features: init-only setters let object initializers create immutable properties; records with value equality and the with-expression generate cloning constructors, deconstructors and concise positional syntax; top-level statements remove Program/Main ceremony; pattern matching gains relational and logical patterns and simple-type checks; compiler now does smarter target-typing for new and conditional expressions and supports covariant-like returns.

AI-written summary · about

" chapters (10)

1. 0:00Introduction and speaker info
2. 1:12C# 9 release timeline
3. 2:37Improved properties with init
4. 5:06New records concept
5. 9:19Records concise syntax
6. 11:55Records equality and inheritance
7. 12:18Top-level statements in main
8. 13:20Pattern matching improvements
9. 15:07Other small C# 9 features
10. 17:56Summary and Q&A

" related talks

• 59mWhat's new in C#? Exciting new features in C# 9, 10 and 11!Filip Ekberg · Copenhagen Developers Festival 2023
• 01h 00mWhat's new in C#? - Exciting new features in C# 9, 10 and 11!Filip Ekberg · NDC Oslo 2023
• 55mLet’s catch up with C#! Exciting new features in C# 9, 10, 11 and 12!Filip Ekberg · CPH DevFest 2024
• 41mWhat's New in C# 9Andrey Dyatlov · DotFest 2020
• 59mLet’s catch up with C#! Exciting new features in C# 9, 10, 11, 12 and 13!Filip Ekberg · NDC Copenhagen 2025
• 59mLet’s catch up with C#! Exciting new features in C# 9, 10, 11, 12 and 13!Filip Ekberg · NDC Oslo 2025
• 59mWhat's new in C#? Exciting new features in C# 8.0, 9.0 and 10!Filip Ekberg · NDC Sydney 2022
• 01h 14mThe Top 10 Best New Features in C# Version 6 to 9Chris Klug · JetBrains .NET Days Online 2021