dotnet/roslyn

Implementing interface (or abstract class) whose members reference a type included via a global import adds empty line to the beginning of file

Open

#79 363 ouverte le 14 juil. 2025

Voir sur GitHub
 (5 commentaires) (0 réactions) (0 assignés)C# (4 257 forks)batch import
Area-IDEhelp wanted

Métriques du dépôt

Stars
 (20 414 stars)
Métriques de merge PR
 (Merge moyen 6j 17h) (256 PRs mergées en 30 j)

Description

Full issue information + repro project:
https://github.com/just-ero/roslyn-issues-repros/tree/main/5.0.0/003_ImplementInterface_ReturnTypeInGlobalUsings

Version

[!NOTE]
Roslyn: 5.0.0-1.25319.11
.NET SDK: 10.0.100-preview.5.25277.114

Visual Studio Code: 1.102.0
C# Extension: 2.84.19
C# Dev Kit Extension: 1.30.44

Steps to Reproduce

  1. Add the following code in separate files:
    namespace N;
    
    class C;
    
    interface II
    {
        C M();
    }
    
    class Repro : II;
    
    Note: C must be in a different namespace than II, and Repro and Repro must not know of C before implemetation.
  2. Add N to the global usings anywhere.
  3. Apply the Implement interface quick fix to Repro.

Expected Behavior

No new line is added to the beginning of the file.

Actual Behavior

It is.

Speculation: this is possibly due to Roslyn making an attempt to add missing namespaces, but stopping after finding the global import.

Guide contributeur