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SortListByProperty: .NET 10, fixed benchmark, descending sort, honest tests - #2267
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… tests - Retarget both projects to net10.0; BenchmarkDotNet 0.15.8, MSTest 4.4.1 (one meta package replaces the adapter and framework), Microsoft.NET.Test.Sdk 18.10.1, coverlet.collector 10.1.0. - Benchmark: every invocation now sorts a fresh unsorted copy (IterationSetup), so the in-place rows no longer sort an already sorted list. The IComparable row sorts by Pages, so it is renamed SortByPagesIComparable and gets a like-for-like SortByPagesUsingLinq row, plus SortByPagesDescendingUsingLinq. Benchmarks move to their own SortBenchmarks class. - The multiple-properties test could not fail: the unsorted input was already in the expected order. The input order changes and a second test proves the result differs from the input and from an Author-only sort. - Descending sample: SortByPagesDescendingUsingLinq and the in-place Sort((x, y) => y.Pages.CompareTo(x.Pages)) form, with a test for each. - File-scoped namespaces, Random.Shared, target-typed new(), required properties and nullable parameters on the comparers (nine nullable warnings gone), unused benchmark variable dropped.
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Updates collections-lists/SortListByProperty for the refreshed article "Sort a List of Objects by Property in C#" (https://code-maze.com/sort-list-by-object-property-dotnet/). Only this folder changes.
Packages (re-queried on NuGet 2026-10-04, newest stable):
Benchmark fix:
Tests:
Idioms: file-scoped namespaces, Random.Shared, target-typed new(), required properties, nullable comparer parameters.
Built and benchmarked on Windows 10 (10.0.19045), SDK 10.0.302, runtime .NET 10.0.10, BenchmarkDotNet 0.15.8.