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Asked: 2026-05-13T09:38:27+00:00

I’m trying to get into unit testing with C#. Various people told me to

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I’m trying to get into unit testing with C#. Various people told me to go with NUnit since it’s better than MSTest (apparently, I have no idea) and it also has very good support in ReSharper which I’m using.

Now I’ve never written a unit test before in my life (bear with me, I’m a university student). ReSharper has this nice CreateUnitTests context menu option that I’ve seen others (casually looking over the shoulder) use to great success. You right-click in a method, select CreateUnitTests and there you go, a test skeleton is created. You just fill in the important bits.

Now when I try the same, ReSharper wants me to create a new Test Project… and when I let it, it creates (what I’m assuming) a MSTest project with obviously a MSTest test template. But I already have a class libarary project which references “nunit.framework” and has a few NUnit tests that ReSharper is more than willing to run. Still, it only ever creates MSTest test templates, and only ever in special “Test Project” projects.

What am I doing wrong? Am I doing something wrong at all, or is creating NUnit test templates not possible with ReSharper? I’ve searched the net and read the documentation of ReSharper and NUnit and I still can’t figure out is this even possible or what.

I’d be grateful if anyone could provide me with a sort of guide to using ReSharper + NUnit.

EDIT: I’m using ReSharper 4.5 and NUnit 2.5.3

EDIT2: Apparently I’m an idiot. CreateUnitTests is not part of ReSharper, but part of Visual Studio and thus only ever works with MSTest.

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1 Answer

  1. Editorial Team

    In your test project which Resharper created, remove the reference to the Microsoft unit testing DLL (I don’t recall the name off hand, but it’s quite a long name).

    Then add a new reference – nunit.framework.dll, you should find it on the first tab of the Add Reference dialog.

    Add using NUnit.Framework to to the unit test class file.

    You then need to change attributes:

    [TestClass] to [TestFixture]
[TestMethod] to [Test]

    So if you end up with a MSTest project, use the above steps to get NUnit instead.

    NOTE: Resharper 4.5 onwards does have native support for running MSTest as well as NUNit tests. So you could try that instead.

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