The long-awaited union types in C# will be implemented in .NET 11 and C# 15. This article explains the new feature that brings powerful functional programming patterns to C#.

Mature programming languages rarely receive a foundational structure the community has anticipated for years. Microsoft recently released the highly anticipated C# 15 preview version. This release officially introduces union types, strictly closed hierarchies, and revised protocols for managing unsafe code. The company schedules the official launch for November 2026, coinciding directly with the .NET 11 release. The Power of Union Types…

Union Types in C# 15.0 erklärt: Syntax, Pattern Matching, Voraussetzungen und Praxisbeispiel für Discriminated Unions.

In C# abbiamo sempre avuto diversi modi per rappresentare un valore che può assumere forme differenti: gerarchie di classi, record, enum, Result pattern o librerie dedicate. Con C# 15 arrivano le Union Types, ma la domanda è: ci servivano davvero? In questa puntata parto da alcuni casi concreti per capire cosa semplificano, come si integrano con pattern matching e ASP.NET Core e, soprattutto, quando possono migliorare davvero leggibilità e manutenzione del codice… e quando invece rischiano solamente di complicarlo. - https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-15 - https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/union - https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/tutorials/unions #dotnet #csharp #csharp15 #dotnet11 #uniontypes #discriminatedunions #aspnetcore #minimalapi #softwaredevelopment #programming #developers #dotnetdeveloper #coding #softwarearchitecture #dotnetinpillole