With my team, we like to keep our C# code base updated. So, recently we went to .NET 7 and C# 11. At the same time, we were still adopting some of the new capabilities of .NET 6 and C# 10. Our code base is large, so it takes some time. One of the new features that we planned to use was the ArgumentNullException.ThrowIfNull method, which throws an exception if an argument is null. In this post, I will show you how I effortlessly did that refactoring by letting the machine work and not the human 😁 (me). In the past, I used the same approach to migrate lots of code that used Assert.True() to Assert.That(, Is.True) and for some other even more complex cases. We will use ReSharper and Rider for that.

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Since some time I have the current scenario where I need to have conditional reference in a project. Basically the application must reference an assembly in one case in other it should reference another one. This was working correctly from an MSBuild point of view as the first implemented solution let me compile and run the application on my development machine and it was also working for our TeamCity build server. So everything was fine in this perfect word expect one thing!

The issue was the following; Visual Studio was showing two references of the ‘same assembly’ with different path. Not really an issue you would say because the correct one was used at compile time and at run time in all configurations. So the issue was that this had an impact of ReSharper. And this is I cannot accept because it affect my productivity.

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As part of the Jetbrains Academy I am using/testing ReSharper 5 for around a month now. It is quite stable for a pre-release and I have lots of fun using it, and as always a productivity boost. Some of my preferred features are: External Sources, ASP.NET MVC integration, Solution-Wide Warnings and Suggestions, Upgrade-to-LINQ Actions. Till now I wasn’t able to test the Native NUnit Support, but this is definitely something I will test in the near future.

Jetbrains just posted on their blog ReSharper 5.0 Overview, check it out:

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As you might have realized following my blog, I am big fan of JetBrains ReSharper for quite some years! This tool really boost my productivity. Today they just realized ReSharper 4.5 which brings some new functionalities but also a huge improvement in performance.

What’s New in ReSharper 4.5
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Laurent Kempé

I am an experienced Team Leader & Distinguished Solution Architect with a passion for shipping high-quality products by empowering development team and culture toward an agile mindset. I bring technical vision and strategy, leading engineering teams to move product, processes and architecture forward.


Team Leader, Distinguished Solutions Architect


Illzach, France