Filter out missing import fixes that would add references (#36251)

* Filter out missing import fixes that would add references

* Remove superfluous IsEmpty check

src/Features/Core/Portable/CodeRefactorings/AddMissingImports/AbstractAddMissingImportsFeatureService.cs

@@ -48,7 +48,10 @@ public async Task<Project> AddMissingImportsAsync(Document document, TextSpan te
             }
 
             // Find fixes for the diagnostic where there is only a single fix.
-            var usableFixes = await GetUnambiguousFixesAsync(document, diagnostics, cancellationToken).ConfigureAwait(false);
+            var unambiguousFixes = await GetUnambiguousFixesAsync(document, diagnostics, cancellationToken).ConfigureAwait(false);
+
+            // We do not want to add project or framework references without the user's input, so filter those out.
+            var usableFixes = unambiguousFixes.WhereAsArray(fixData => DoesNotAddReference(fixData, document.Project.Id));
             if (usableFixes.IsEmpty)
             {
                 return document.Project;
@@ -59,6 +62,13 @@ public async Task<Project> AddMissingImportsAsync(Document document, TextSpan te
             return newDocument.Project;
         }
 
+        private bool DoesNotAddReference(AddImportFixData fixData, ProjectId currentProjectId)
+        {
+            return (fixData.ProjectReferenceToAdd is null || fixData.ProjectReferenceToAdd == currentProjectId)
+                && (fixData.PortableExecutableReferenceProjectId is null || fixData.PortableExecutableReferenceProjectId == currentProjectId)
+                && string.IsNullOrEmpty(fixData.AssemblyReferenceAssemblyName);
+        }
+
         private async Task<ImmutableArray<Diagnostic>> GetDiagnosticsAsync(Document document, TextSpan textSpan, CancellationToken cancellationToken)
         {
             var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);