<PackageReference Include="Microsoft.IdentityModel.Abstractions" Version="8.12.1" />

Microsoft.IdentityModel.Abstractions.ObservabilityConstants

public static class ObservabilityConstants
Common class containing observability constants to be used as well known metric keys.
public const string ActivityId = "ActivityId"

String used for the name of the property indicating the call's Activity Id/Correlation Id.

public const string ClientId = "ClientId"

String used for the name of the property indicating the caller's ClientId.

public const string Duration = "Duration"

String used for the name of the property indicating the call in Duration (ms).

public const string Succeeded = "Succeeded"

String used for the name of the property indicating if the call was successful.