WarningLevel is not always automatically set by AnalysisLevel

[cremor]

The article contains the following information:

Warning waves are enabled using the AnalysisLevel element in your project file.

A similar information is written in the article C# Compiler Options:

However, the .NET SDK sets the WarningLevel to match the AnalysisLevel in your project file.

This is not entirely true. It is true for .NET 7 projects. But it isn't true for old .NET Framework projects, even if they use a SDK style csproj file. For those projects you have to explicitly set <WarningLevel> to get warnings from warning waves.

Note: This might be a change in the .NET 7 SDK. If I remember correctly the .NET 6 SDK worked as documented, even for .NET Framework projects. See dotnet/sdk#24826

---

Document Details

⚠ Do not edit this section. It is required for learn.microsoft.com ➟ GitHub issue linking.

• ID: fe4ec697-f3a5-3df8-8e43-e49df4f3303b
• Version Independent ID: ee47f321-8c41-a867-c25e-4020b7aa75eb
• Content: C# Compiler warning waves
• Content Source: docs/csharp/language-reference/compiler-messages/warning-waves.md
• Product: dotnet-csharp
• Technology: csharp-diagnostics
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

[mavasani]

@jmarolf

[cremor]

Related: #41295