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Tag: newtonsoft-json

3 posts

2026-05-30 migration newtonsoft-json system-text-json

Migrate from Newtonsoft.Json 13 to System.Text.Json in a large .NET 11 codebase

A version-pinned playbook for swapping Newtonsoft.Json 13.0.4 for the in-box System.Text.Json on .NET 11: the attribute and settings mappings, the defaults that silently change your wire format, a staged rollout strategy, verification, and the gotchas that bite large codebases.

2026-05-22 comparison system-text-json newtonsoft-json

System.Text.Json vs Newtonsoft.Json in 2026: which should you pick?

Pick System.Text.Json for new .NET 11 code: it ships in-box, is roughly 2x faster, and is the only one that works with Native AOT. Reach for Newtonsoft.Json only for JSONPath, TypeNameHandling, or genuinely lenient JSON.

2026-05-01 dotnet-11 vstest newtonsoft-json

VSTest drops Newtonsoft.Json in .NET 11 Preview 4 and what breaks if you relied on it transitively

.NET 11 Preview 4 and Visual Studio 18.8 ship a VSTest that no longer flows Newtonsoft.Json into your test projects. Builds that quietly used the transitive copy will break with a single PackageReference fix.