ASP0022: Route conflict detected between route handlers
| Value | |
|---|---|
| Rule ID | ASP0022 |
| Category | Usage |
| Fix is breaking or non-breaking | Non-breaking |
Cause
An HTTP request matches multiple routes, resulting in an ambiguous match error.
Rule description
This diagnostic is emitted when a route conflict is detected.
How to fix violations
To fix a violation of this rule, change the route's pattern, HTTP method, or route constraints.
When to suppress warnings
Do not suppress a warning from this rule.
Notes
ASP0023 warns on route conflicts in ASP.NET Core MVC apps, this analyzer warns on route conflicts in minimal API apps.
This analyzer is intentionally conservative about duplicate routes it reports to avoid false positives:
- The analyzer only reports duplicate routes declared in the same code block in a method. Duplicate routes in different branches of an
ifstatement aren't reported because the analyzer can't statically determine which will be used at runtime. - The analyzer only reports duplicate routes with known metadata. Unknown methods called on a route handler might add new metadata that is then used to customize how the route is matched.
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