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C# Corner

.NET 8 introduces built-in support for polymorphic JSON serialization and deserialization through JsonPolymorphic and JsonDerivedType attributes. This eliminates the need for workarounds when handling inheritance hierarchies in JSON processing. The feature uses a discriminator field to identify the correct derived type during deserialization, making it easier to work with polymorphic objects in APIs, message processing, and document storage scenarios.

Polymorphic deserialization in .NET 8.0

<p>Tried this and honestly it’s quite antipattern to make you abstraction source code depend on all its concrete implementations, especially if from different projects/dlls.</p>


<p>I cannot think of any use case of this, I mean it never crossed my mind to deserialize a type with child or parent, most of the time I deserialize DTOs soo… composition over inheritance ;)</p>
