Why does StyleCopAnalyzers think that global usings should be declared within a namespace, when such syntax is not possible?

Question

I am creating a NUnit test project and in the creation of that, MS Visual Studio has created a file called Usings.cs with the line

global using NUnit.Framework;

which tells the project to include the NUnit framework in every file.

I have been running StyleCopAnalyzers over this test project, and it keeps reporting

SA1200: Using directive should appear within a namespace declaration.

However, when I put the global using within a namespace declaration

namespace TestProject
{
    global using NUnit.Framework;
}

I get the error

CS8914: A global using directive cannot be used in a namespace declaration.

What is the correct approach? Should I use the Usings.cs file with global usings?

I would create a new c# file for that. I think theres also csproj items you can use — Daniel A. White, Aug 11 '22 at 13:30
https://stackoverflow.com/questions/71305266/global-usings-and-net-standard-2-0 — Daniel A. White, Aug 11 '22 at 13:30
Putting `` in the .csproj file works! However with the up-t-to-date [StyleCopAnalyzers](https://github.com/DotNetAnalyzers/StyleCopAnalyzers) the same problem remains when using the separate c# file — suitendaal, Aug 11 '22 at 13:41

score 1 · Answer 1 · answered Aug 11 '22 at 13:49

1

In your .csproj add the following lines

 <ItemGroup>
    <Using Include="NUnit.Framework" />
  </ItemGroup>

answered Aug 11 '22 at 13:49

Tanzim Siddiqee

1

This is only a workaround, and not the answer to the question why StyleCopAnalyzers does not allow me to use `global usings`, or how to use `global usings` while using StyleCopAnalyzers – suitendaal Aug 11 '22 at 13:57
In C# 10.0 you can use Global Usings. and C# 10.0 released with NET 6.0. Can you please tell me your c# version? – Tanzim Siddiqee Aug 11 '22 at 14:05
I am using .NET 6.0, so that is C# 10.0 – suitendaal Aug 11 '22 at 14:08
did you remove remove enable from .csproj file? – Tanzim Siddiqee Aug 11 '22 at 14:16
Yes, but what does that have to do with the NUnit framework? – suitendaal Aug 15 '22 at 08:54

1 Answers1