.NET

C#'s Latest Language Feautes | Powerful and Elegant

Latest features every developer needs to know about.

Records – immutable data objects with value equality
With‑expressions – clone objects with modifications
Pattern matching upgrades – relational, logical, and property patterns
Init‑only setters – immutable properties with flexible initialization
File‑scoped namespaces – cleaner, less-indented files
Global using directives – remove repeated using statements
Top‑level statements – minimal Program.cs and minimal APIs
Required members – enforce object initialization
Primary constructors – constructor parameters directly on classes
Collection expressions – new [] syntax for lists and merging
Raw string literals – perfect for JSON, SQL, and regex without escaping
Nameof improvements – safer refactoring and cleaner code

Examples

Records – immutable data objects with value equality


            public record User(string Name, int Age);

With-expressions – clone objects with modifications


            var user2 = user with { Age = 40 };

Pattern Matching – relational, logical, and property patterns


            if (person is { Age: > 18 and < 30 })
            {
                Console.WriteLine("Young adult");
            }

Init-only setters – immutable properties with flexible initialization


            public class Product
            {
                public string Name { get; init; }
                public decimal Price { get; init; }
            }

            var p = new Product { Name = "Book", Price = 9.99m };

File-scoped namespaces – cleaner files


            namespace MyApp;

            public class Service { }

Global using directives – remove repeated using statements


            // GlobalUsings.cs
            global using System;
            global using System.Linq;

Top-level statements – minimal Program.cs


            Console.WriteLine("Hello World");