dotnet-format-source-generator's Introduction

dotnet format 'Using directive is unnecessary' false positive

This repository contains a minimal reproducible example for a false positive in dotnet format

Description

The ExampleGenerator is a Roslyn source generator that generates GeneratedClass into the Example.Generated namespace in the Example project. This generated class is used in the SuperClass and thus imports the Example.Generated namespace with a using directive.

Running dotnet format --verify-no-changes errors out with:

$ dotnet format --verify-no-changes
/{path}/Example/Class.cs(1,1): error IDE0005: Using directive is unnecessary. [/{path}/Example/Example.csproj]

Running dotnet format removes the using which leads to a compilation error afterward:

$ dotnet format                                                                                                                                                                     main U
$ dotnet build                                                                                                                                                                     main MU
MSBuild version 17.9.8+b34f75857 for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
  ExampleGenerator -> /{path}/ExampleGenerator/bin/Debug/netstandard2.0/ExampleGenerator.dll
/{path}/Example/Class.cs(3,25): error CS0246: The type or namespace name 'GeneratedClass' could not be found (are you missing a using directive or an assembly reference?) [/{path}/Example/Example.csproj]

Build FAILED.

/{path}/Example/Class.cs(3,25): error CS0246: The type or namespace name 'GeneratedClass' could not be found (are you missing a using directive or an assembly reference?) [/{path}/Example/Example.csproj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:00.75

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