Tag: records

A with expression calls the record's compiler-generated <Clone>$ method, which runs a copy constructor that copies every instance field and skips all initializers. That is why properties initialized from other properties, cached values, and Guid IDs come out stale. Measured on .NET 10 with C# 14, with the fixes that actually work.

Pick Dart 3.12 records for ephemeral, locally-shaped data with no methods, and Freezed 3.x classes for named domain models that need copyWith, sealed unions, JSON serialization, or any behaviour.

C# 14 gives you four data-type shapes -- class, record class, struct, and record struct. This is the decision matrix: when each one is correct, what each one costs, and the rules that pick for you.

A practical guide to mixing C# records and EF Core 11. Where records fit, where they break change tracking, and how to model value objects, entities, and projections without fighting the framework.

Seven ways to return more than one value from a C# 14 method: named tuples, out parameters, records, structs, deconstruction, and the extension-member trick for types you don't own. Real benchmarks and a decision matrix at the end.