Maarten Balliauw • 9/18/2023

Discriminated Unions in C#

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This article discusses the concept of discriminated unions, a feature long requested for C#. It explains how they allow defining a return type as one of several pre-defined types, enabling compiler and IDE support. The article provides a detailed example using ASP.NET Core Minimal APIs' Results<> and TypedResults types, shows a custom implementation, and covers pattern matching and type safety benefits.

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#type system #c #Aspnet Core
Discriminated Unions in C#

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