In a previous posts, I explained how to computing code coverage for a .NET Core project with Azure DevOps and Coverlet. In this post, the code coverage visualization could be done directly in Azure DevOps. As a developer, you want to see these results directly into the IDE. Download the code coverage file from the build artifacts Open the file in Visual Studio In the "Code Coverage Results" tool window,… [read more]

A Roslyn Analyzer must target .NET Standard 2.0. However, you may want to target a more recent framework such as .NET 5.0 to take advantages of the Nullable Reference Types. While Nullable Reference Types work with libraries targeting .NET Standard 2.0, older targets cannot take advantage of the framework annotations. So, you'll get lots of meaningless warnings. You can read my previous post for more… [read more]

Roslyn Analyzers are packaged as NuGet packages. If you are new to Roslyn Analyzers, you can check previous posts of the series. If your Roslyn analyzer has a dependency on another NuGet package, you need to customize the way your analyzer is packaged. Indeed, if you add a <PackageReference> to your project, Roslyn won't be able to resolve the referenced package at runtime. In this case, you'll get the… [read more]

Strings are complicated! One thing I often see is people using char.IsUpper or char.ToUpper wrongly. For instance, they want to convert the first character of a string to the upper-case for display. The easy way to do it, which is the wrong way, is the following: static string FirstCharacterToUpperCaseBad(string str) { if(string.IsNullOrEmpty(str) || char.IsUpper(str[0])) return str; return… [read more]

Blazor provides building blocks for creating forms. It includes editor components, model validation, and model binding. When you want to create a form, you need to create an object to store the form data and create the razor component with labels and editors for each property. This is tedious when you want to quickly create a basic form. To speed up this process, I've created a generic form component.… [read more]

In my projects, I often deal with paths. However, there are many traps when working with path: A path can be absolute or relative (c:\a\b, .\a\b) A path can contain navigation segments (., ..) A path can end with a directory separator or not (c:\a or c:\a\) A path can contain empty segments (c:\a\\b) A path can alternate between multiple directory separators on Windows (c:\a/b\c) A path can be… [read more]

In an application, you don't want to waste resources. When an ongoing operation is not needed anymore, you should cancel it. For instance, if your application downloads data to show them in a view, and the user navigates away from this view, you should cancel the download. In a .NET application, the way to cancel operation is to use a CancellationToken. You can create a CancellationToken using the… [read more]

GitHub Super-Linter is a simple combination of various linters to help validate your source code. The end goal of this tool: Prevent broken code from being uploaded to your repository Help establish coding best practices across multiple languages Build guidelines for code layout and format Automate the process to help streamline code reviews Instead of using many linters individually in your CI, you can… [read more]

If you use an internal NuGet server or just want to be explicit on the sources to use to restore package, you need to set the source in the NuGet configuration. You can use the dotnet nuget command to manage sources: dotnet nuget add source https://api.nuget.org/v3/index.json --name nuget.org dotnet nuget add source https://azureartifacts.microsoft.com/myTeam --name myTeam --username user --password pass… [read more]

I received an email from a service that catches spelling errors, grammar errors, and broken links on websites. They spam website owners to sell their services. Here's the content of the email: I wrote 340 posts and there are only 27 errors, I was happy 😃 But getting 0 error is still better. So, I clicked on the link. On the webpage, you can see a few errors for free. Then, you have to subscribe to get… [read more]