Skip to main content

C# 10–File scoped namespaces

Last week I had a pair programming session with a candidate. The candidate had a background in C and was new to C#. While he was writing some code, he was struggling with namespaces in C#. It even got me confused as I completely forgot that C# 10 introduced a new feature 'file scoped namespaces'.

I always had written namespaces in any of the following ways:

The advantage of this approach is that you could have multiple namespaces in one file. But in reality I think I never used this possibility. The disadvantage is that traditional namespaces add some extra ceremony to your code.

C# 10 gets rid of this boilerplate code when you want to use only one namespace per file. So the example above can be rewritten as:

All the types we write in this file will be part of the X.Y.Z namespace.

Update your existing code

To update your existing code in one go, you can use the dotnet format tool:

dotnet tool update --global dotnet-format
dotnet format Example.sln --severity info --diagnostics=IDE0161
Labels:

Popular posts from this blog

DevToys–A swiss army knife for developers

As a developer there are a lot of small tasks you need to do as part of your coding, debugging and testing activities.  DevToys is an offline windows app that tries to help you with these tasks. Instead of using different websites you get a fully offline experience offering help for a large list of tasks. Many tools are available. Here is the current list: Converters JSON <> YAML Timestamp Number Base Cron Parser Encoders / Decoders HTML URL Base64 Text & Image GZip JWT Decoder Formatters JSON SQL XML Generators Hash (MD5, SHA1, SHA256, SHA512) UUID 1 and 4 Lorem Ipsum Checksum Text Escape / Unescape Inspector & Case Converter Regex Tester Text Comparer XML Validator Markdown Preview Graphic Color B
Read more

Help! I accidently enabled HSTS–on localhost

I ran into an issue after accidently enabling HSTS for a website on localhost. This was not an issue for the original website that was running in IIS and had a certificate configured. But when I tried to run an Angular app a little bit later on http://localhost:4200 the browser redirected me immediately to https://localhost . Whoops! That was not what I wanted in this case. To fix it, you need to go the network settings of your browser, there are available at: chrome://net-internals/#hsts edge://net-internals/#hsts brave://net-internals/#hsts Enter ‘localhost’ in the domain textbox under the Delete domain security policies section and hit Delete . That should do the trick…
Read more

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more