Enumerates actions that can be taken when an aspect is applied to a target element that is not currently supported.
public sealed class UnsupportedTargetAction : Enum
Same as Fail.
Emit a build-time error when the target declaration is not supported by the aspect. This is the default behavior.
Fall back to a supported advising strategy if any is available, e.g. from semantic advising (taking into account async semantics) to non-semantic advising. If no fallback is available, emit a build-time error.
Do not apply the advice when the target declaration is not supported but do not emit a build error.