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RoslynAnalyzers The 'ModuleInitializer' attribute should not be used in libraries

Module initializers are intended to be used by application code to ensure an application's components are initialized before the application code begins executing. If library code declares a method with the 'ModuleInitializerAttribute', it can interfere with application initialization and also lead to limitations in that application's trimming abilities. Instead of using methods marked with 'ModuleInitializerAttribute', the library should expose methods that can be used to initialize any components within the library and allow the application to invoke the method during application initialization.

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

CA2255
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | C# | Roslyn Analyzers

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection CA2255

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

JetBrains Rider 2025.2, Qodana for .NET 2025.2,

Last modified: 18 September 2025