<PackageReference Include="Microsoft.IdentityModel.Protocols" Version="8.18.0" />

Microsoft.IdentityModel.Protocols.Configuration.IConfigurationEventHandler<T>

public interface IConfigurationEventHandler<T>
Defines event handlers for configuration retrieval and update operations.
Task AfterUpdateAsync(string metadataAddress, T configuration, CancellationToken cancellationToken = default)

Called after a configuration has been successfully retrieved in a fire-and-forget manner.

Task<ConfigurationEventHandlerResult<T>> BeforeRetrieveAsync(string metadataAddress, CancellationToken cancellationToken = default)

Called before retrieving configuration from the metadata endpoint.