The AnalysisLevel property seems to be shared between C# compiler messages and Roslyn code analysis. I'll log an issue to make note of this in the code analysis and C# compiler options docs.

We also might want to update the verbiage around CodeAnalysisRuleSet since rulesets are deprecated in favor of .editorconfig files.

Originally posted by @gewarren in #29498 (comment)

Document Details

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• ID: 26ef35c2-6df4-26f8-32b2-9b50eb76c037
• Version Independent ID: e57ac82b-307e-163b-8172-52644b3a6baa
• Content: C# Compiler Options - errors and warnings
• Content Source: docs/csharp/language-reference/compiler-options/errors-warnings.md
• Product: dotnet-csharp
• Technology: csharp-language-reference
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

Associated WorkItem - 436872