By default, if the JSON payload you're deserializing contains properties that don't exist in the deserialized plain old CLR object (POCO) type, they're simply ignored. Starting in .NET 8, you can specify that all members must be present in the payload. James and Matt show you how!

Docs: https://learn.microsoft.com/dotnet/standard/serialization/system-text-json/missing-members

00:00 - Intro

00:55 - Default Implementation Demo

01:40 - Requiring Unmapped Members

03:20 - Wrap-up

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#dotnet #json #systemtextjson