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Top 3 C# fluent-assertion Projects
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Fluent Assertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET Core 3.0, .NET 6, .NET Standard 2.0 and 2.1. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3.
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ReSharper
ReSharper is now available in VS Code and Cursor. ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.
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Axiom-Assertions
Deterministic fluent assertions for .NET tests with batching, analyzers, equivalency, and vector and retrieval assertions.
Project mention: I wrote a .NET assertion library to understand assertion libraries | dev.to | 2026-05-05
C# fluent-assertions discussion
C# fluent-assertions related posts
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FluentAssertions No Longer OSS
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fluentassertions – Update Ownership and License
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Fluent assertion sneakily changed from Apache 2.0 to Source-Available
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FluentAssertions 8 has changed its license to a commercial model
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[Parte 8] ASP.NET Core: Integration Tests
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My first NuGet package: Fluent Random Picker
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Honk#! Honk in convenient C# now!
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A note from our sponsor - ReSharper
www.jetbrains.com | 16 Jul 2026
Index
What are some of the best open-source fluent-assertion projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Fluent Assertions | 3,819 |
| 2 | fluentassertions.analyzers | 132 |
| 3 | Axiom-Assertions | 3 |