Fix analyzer RCS1206 (#1685) #2560

Job	Run time
pre_build	3m 29s
build_core_and_testing	1m 5s
build_analyzers (formatting_analyzers, Formatting.Analyzers, FormattingAnalyzers)	1m 3s
build_analyzers (analyzers, Analyzers, Analyzers)	1m 5s
build_core_cli	54s
build_code_fixes	57s
build_refactorings	1m 0s
build_framework_cli	1m 39s
build_analyzers (code_analysis_analyzers, CodeAnalysis.Analyzers, CodeAnalysisAnalyzers)	56s
build_vs_extension	1m 53s
build_vs_code_extension	1m 13s
publish_nuget_packages	0s
publish_cli_nuget_packages	0s
publish_vs_extension	0s
publish_vs_code_extension	-1s
publish_ovsx_extension	0s
	15m 13s

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