C# 15 Preview – What’s New Before the Final Release
C# 15 is in preview with .NET 11. Explore union types, closed hierarchies, extension indexers, labeled break and more, with simple code samples.
Category .NET
Why I Built a .NET Library for Sri Lanka’s Administrative Divisions
Working with Sri Lanka's administrative hierarchy in .NET used to mean piecing together scattered data. LankaLens.AdministrativeDivisions packages it into one offline, open-source NuGet package — now stable at v1.0.0.
C# 15 Union Types Explained Simply – A Better Way to Handle Multiple Return Types
C# 15 introduces Union Types — a simple and type-safe way to handle multiple return types. Learn how it works and how to try it with .NET 11 Preview 2.
Data Validation in .NET 10 Minimal APIs – Built-In, Clean, and No Extra Libraries
.NET 10 introduces built-in data validation for Minimal APIs—no need for external libraries. This guide walks through Data Annotations, custom validation, and automatic error handling with real-world examples.
New LINQ Methods in .NET 9: Index, CountBy, and AggregateBy
.NET 9 introduces powerful new LINQ methods — Index, CountBy, and AggregateBy. This guide explains each method with before-and-after examples, showing how they reduce boilerplate and make queries more readable.