How to generate class with file-scoped namespace syntax (C# 10) in vs code?

Question

I would like to generate a new C# Class or C# Interface in Microsoft Visual Studio Code following the newest C#10 file-scoped namespace syntax.

https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/types/namespaces

Beginning with C# 10, you can declare a namespace for all types defined in that file, as shown in the following example:
namespace SampleNamespace;

class AnotherSampleClass
{
    public void AnotherSampleMethod()
    {
        System.Console.WriteLine(
            "SampleMethod inside SampleNamespace");
    }
}

I'm generating C# classes this way:

Right click on folder in the explorer -> New C# Class.

The output looks like this: (the old syntax with curly braces)

namespace SampleNamespace
{
    class SampleClass
    {
        public void SampleMethod()
        {
            System.Console.WriteLine(
                "SampleMethod inside SampleNamespace");
        }
    }
}

I'm using C# for Visual Studio Code (powered by OmniSharp). v1.24.0

VS Code version is 1.62.3

Is there any way to override the generator behaviour to generate new file-scoped namespace syntax?

Does this answer your question? VS 2022 - Convert to file-scoped namespace in all files — jazb
– jazb, Commented Feb 2, 2022 at 6:53
Just delete the curly bracket after the namespace, and at the file end, put a semicolon after the namespace and un-dent the whole file (Ctrl-a, shift-tab)? — Caius Jard
– Caius Jard, Commented Feb 2, 2022 at 6:56
@CaiusJard I'm lazy :), I don't want to repeat these steps every time I created a new class. — Mikolaj
– Mikolaj, Commented May 6, 2022 at 10:37
There is an extension called csharpextensions (no longer maintained), however, you could add a new template here with file-scoped namespace sintax. I'm not very good at JavaScript :(, otherwise I would make a fork and publish a new extension with that feature. — MrDave
– MrDave, Commented Dec 9, 2022 at 3:13

Boomer · Accepted Answer · 2022-12-22 23:42:31Z

49

Sorry this is a late response but I've just been at this myself.

What you're looking for is a Visual Studio setting.

Go to: Tools > Options > Text Editor > C# > Code Style

The 4th block down, "Code block preferences"

Change "Namespace declarations" from "Block scoped" to "File scoped"

(This is in Visual Studio 2022)

EDIT (Dec 22nd):

For VS Code, I have installed "C# Extensions" by JosKreativ

Once installed, go to: File > Preferences > Settings

In the "Search settings" textbox type "namespace"

You'll see the option (for me 3rd);

"Csharpextensions: Use File Scoped Namespace"

Check that checkbox and you're good to go.

edited Dec 22, 2022 at 23:42

answered Aug 1, 2022 at 11:38

Boomer

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1 Comment

rebecsan Over a year ago

This is a great instruction for Visual studio but the question was how to implement it in Visual Studio Code.

Caius Jard · Accepted Answer · 2022-05-06 13:41:59Z

If you don't get the answer you seek in terms of changing the generator, you could consider:

Install AutoHotKey
Add this to the AHK script:

; CtrlAltN - convert to file scoped namespace
^!N::
KeyWait Control
KeyWait Alt
Send ^{Home}{Down}{Delete}{Delete}^{End}{Backspace}^a+{Tab}
return

Make a new class
Put the cursor anywhere in it and press Ctrl+Alt+M

It literally presses the following keys (after waiting for you to release Ctrl, Alt)

Ctrl+Home - cursor to top of file
Down - cursor to { line
Del Del - remove { and line
Ctrl+End - go to end
Bksp - remove }
Ctrl+a - select all
Shift+Tab - undent

I'm sure you can tweak the script as required; ; prefixing a line is a comment, ^!N:: is a hotkey ^ means Ctrl, ! means Alt, + means Shift.. Then the other keys are either {named} or literal chars

William Ardila · Accepted Answer · 2023-06-23 04:22:53Z

0

If you look for the snippets created, you will find namespace and fsnamespace (file name namespace).

In short, you should start typing fsnamespace until you get the suggestion and then press enter.

Another option is to create a snippet. To do that, go to Preferences -> Configure User Snippets -> Select if you want it for the language or project and then paste the following:

"Namespace": {
    "prefix": "namespace",
    "body": [
        "namespace ${1:Name};"
    ],
    "description": "Namespace"
},

answered Jun 23, 2023 at 4:22

William Ardila

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Comments

Andyrub18 · Accepted Answer · 2022-09-30 15:57:55Z

-2

you should go to user preference settings (ctrl + alt + p), search for namespace and check csharpextension: use file scoped namespace. And it will work for all .NET 6 + projects

answered Sep 30, 2022 at 15:57

Andyrub18

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1 Comment

Mikolaj Over a year ago

Does it work in vs code?

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