CA2257: Members defined on an interface with the 'DynamicInterfaceCastableImplementationAttribute' should be 'static'
| Property | Value |
|---|---|
| Rule ID | CA2257 |
| Title | Members defined on an interface with the 'DynamicInterfaceCastableImplementationAttribute' should be 'static' |
| Category | Usage |
| Fix is breaking or non-breaking | Non-breaking |
| Enabled by default in .NET 9 | As warning |
Cause
An interface member isn't explicitly implemented or marked static.
Rule description
Since a type that implements IDynamicInterfaceCastable may not implement a dynamic interface in metadata, calls to an instance interface member that is not an explicit implementation defined on this type are likely to fail at run time. To avoid run-time errors, mark new interface members static.
How to fix violations
Mark the interface member static.
When to suppress errors
Do not suppress a warning from this rule.
See also
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