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`virtual` - `abstract` - `override` It reports each declared event variable independently, including multi-name declarations such as `event EventHandler A, B;`. It does not report: - events with explicit `add` and `remove` accessors - interface events - non-virtual field-like events - delegates, fields, properties, or malformed text that does not parse into an event field declaration - generated files such as `*.g.cs`, `*.designer.cs`, `*.generated.cs`, and files with `` headers unless `include_generated=true` Generated files can be included explicitly: ```bash npx codemod workflow run -w . -t /path/to/repository --param include_generated=true ``` The package emits one stable `codemod:metrics` record: - `cs_virtual_field_like_event_occurrence` — one increment per finding, with cardinality for `file`, `line`, `type`, `event`, `remediation`, and `severity`. Remediation guidance: prefer non-virtual field-like events by default. When inherited subscription behavior must be customized intentionally, replace the field-like event with an explicit event declaration that provides `add` and `remove` accessors. ## Development ```bash # Validate the workflow, run fixtures, and verify committed findings/metrics snapshots pnpm test # Refresh expected fixture snapshots intentionally while authoring pnpm test:update # Run the workflow locally npx codemod workflow run -w . -t /path/to/repository # Publish to registry npx codemod login npx codemod publish ``` ## License MIT 1a:[["$","script",null,{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"$48"}}],["$","$L49",null,{"state":{"mutations":[],"queries":[{"dehydratedAt":1789947764862,"state":{"data":{"json":{"id":"e190f21e-22d7-48c9-a547-458989c87c70","name":"detect-virtual-field-like-events-csharp","displayName":"@codemod/detect-virtual-field-like-events-csharp","description":"Read-only C# analysis codemod that reports field-like event declarations marked virtual, abstract, or override and emits stable findings and metrics.","scope":"codemod","visibility":"public","downloadCount":96,"executionCount":13,"createdAt":"2026-07-10 14:02:07.437783+00","updatedAt":"2026-08-25 07:38:24.194253+00","latestVersion":"1.0.1","keywords":["csharp","events","analysis","maintainability"],"starCount":0,"author":"Codemod","homepage":null,"repository":null,"license":"MIT","access":"pro","documentation":null,"bugsUrl":null,"readme":"$4a","organization":{"id":"a23e5412-b7c7-435e-ad5a-292e3fe3e6cf","name":"codemod","slug":"codemod","avatarUrl":"https://avatars.githubusercontent.com/u/78830094?v=4"},"owner":{"id":"62e204ad-3c4b-43d9-b513-a48dd273b6c5","username":"ribru17","name":"Riley Bruins","avatarUrl":"https://avatars.githubusercontent.com/u/55766287?v=4"},"isLegacy":false,"versions":[{"version":{"id":"7d22c6a3-f7eb-486f-9407-6707e4d2522e","packageId":"e190f21e-22d7-48c9-a547-458989c87c70","version":"1.0.1","description":"Read-only C# analysis codemod that reports field-like event declarations marked virtual, abstract, or override and emits stable findings and metrics.","manifest":{"name":"@codemod/detect-virtual-field-like-events-csharp","author":"Codemod","license":"MIT","targets":{"versions":{},"languages":["csharp"],"frameworks":[]},"version":"1.0.1","keywords":["csharp","events","analysis","maintainability"],"registry":{"access":"pro","visibility":"public"},"workflows":[{"name":"main","path":"workflow.yaml","default":true}],"description":"Read-only C# analysis codemod that reports field-like event declarations marked virtual, abstract, or override and emits stable findings and metrics.","dependencies":[],"schema_version":"1.0"},"checksum":"c59a53b1fe39f73855c92b457ce354229b541e601e3828d015751e11a14c3e3f","size":11358,"downloadUrl":"https://registry-cdn.codemod.com/prod/packages/private/codemod/detect-virtual-field-like-events-csharp/1.0.1/private-c59a_nl36k7lxa3.tar.gz","aiGenerated":false,"sourceArchiveS3Key":null,"targets":{"languages":["typescript"],"frameworks":[]},"dependencies":[],"languages":["csharp"],"stepTypes":["js-ast-grep"],"workflowMetadata":{"nodes":[{"id":"detect-virtual-field-like-events","name":"Detect virtual field-like events in C#","steps":[{"name":"Scan C# files and report field-like event findings","type":"js-ast-grep","metrics":[],"language":"csharp"}]}],"metricMetadataVersion":1},"validated":false,"validationErrors":null,"publishedBy":"62e204ad-3c4b-43d9-b513-a48dd273b6c5","deprecated":false,"deprecationMessage":null,"downloadCount":68,"cachedTestCases":{"input":"// \nusing System;\n\nnamespace Demo.Events;\n\npublic class HeaderGeneratedWidget\n{\n public override event EventHandler Changed;\n}\n","output":"// \nusing System;\n\nnamespace Demo.Events;\n\npublic class HeaderGeneratedWidget\n{\n public override event EventHandler Changed;\n}\n","isValid":true,"examples":[{"name":"App","path":"tests/fixtures/negative-generated-and-lookalikes/src/App","input":"// \nusing System;\n\nnamespace Demo.Events;\n\npublic class HeaderGeneratedWidget\n{\n public override event EventHandler Changed;\n}\n","output":"// \nusing System;\n\nnamespace Demo.Events;\n\npublic class HeaderGeneratedWidget\n{\n public override event EventHandler Changed;\n}\n","filename":"HeaderGenerated.cs"},{"name":"App","path":"tests/fixtures/negative-generated-and-lookalikes/src/App","input":"using System;\n\nnamespace Demo.Events;\n\npublic interface IWidget\n{\n event EventHandler Changed;\n}\n\npublic class AccessorWidget\n{\n public virtual event EventHandler Changed\n {\n add { }\n remove { }\n }\n\n public event EventHandler Plain;\n public delegate void ChangedDelegate();\n public EventHandler? 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