FakeItEasy

v9.0.1

It's faking amazing! The easy mocking library for .NET that works great in C# and VB.NET alike. No need to know the difference between a stub, a mock or a spy, everything's a fake! The easy to use, refactoring friendly API makes faking a breeze.

FakeItEasy

TDD unittesting mocks mocking fakes faking stubs stubbing spy spies doubles isolation substitutes substitution

NuGet Stats Changelog

Total Downloads

79.1M

79,111,389

Published

Jan 24, 2026

Latest stable version

Install

.NET CLI

dotnet add package FakeItEasy --version 9.0.1

Package Manager Console

Install-Package FakeItEasy -Version 9.0.1

PackageReference

<PackageReference Include="FakeItEasy" Version="9.0.1" />

Frameworks

.NETFramework4.6.2 net8.0 net10.0

Dependencies

Castle.Core

.NETFramework4.6.2

[5.2.1, )

Castle.Core

net8.0

[5.2.1, )

Castle.Core

net10.0

[5.2.1, )

Adoption guide

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Compatibility metadata lists 3 target frameworks; confirm the exact target used by your application.

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