This is issue is to track ideas for analyzers for Minimal API scenarios:

Errors:

• Detecting when types that implement IActionResult are returned from route handlers. This will result in serializing the result as JSON which is unintended.

  app.Map("/", () => new JsonResult(new { Hello = "World" }));

• Make StartupAnalysisBuilder-based analyzers work with WebApplicationBuilder #34404
• Detecting when attributes are put on a method called by a lambda instead of the lambda itself #35638

  app.Map("/", () => Hello());
  
  [Authorize]
  void Hello() { }

• Create an analyzer to detect mismatched parameter optionality #34553