Code Analysis ReferenceAnalyzersRCS1094On this pageRCS1094: Declare using directive on top levelPropertiesPropertyValueDefault Severitydisabled by defaultMinimum language version-ExamplesExample #1diagnostic.csnamespace Foo{ using System;}fix.csusing System;namespace Foo{}Applies toExtension for VS 2022Extension for VS CodeExtension for Open VSXPackage Roslynator.Analyzers