log4net SDK Reference |

# Level Fields

The fields of the Level class are listed below. For a complete list of Level class members, see the Level Members topic.

#### Public Static (Shared) Fields

Alert | The Alert level designates very severe error events. Take immediate action, alerts.
All | The All level designates the lowest level possible.
Critical | The Critical level designates very severe error events. Critical condition, critical.
Debug | The Debug level designates fine-grained informational events that are most useful to debug an application.
Emergency | The Emergency level designates very severe error events. System unusable, emergencies.
Error | The Error level designates error events that might still allow the application to continue running.
Fatal | The Fatal level designates very severe error events that will presumably lead the application to abort.
Fine | The Fine level designates fine-grained informational events that are most useful to debug an application.
Finer | The Finer level designates fine-grained informational events that are most useful to debug an application.
Finest | The Finest level designates fine-grained informational events that are most useful to debug an application.
Info | The Info level designates informational messages that highlight the progress of the application at coarse-grained level.
Notice | The Notice level designates informational messages that highlight the progress of the application at the highest level.
Off | The Off level designates a higher level than all the rest.
Severe | The Severe level designates very severe error events.
Trace | The Trace level designates fine-grained informational events that are most useful to debug an application.
Verbose | The Verbose level designates fine-grained informational events that are most useful to debug an application.
Warn | The Warn level designates potentially harmful situations.

#### See Also

Level Class | log4net.Core Namespace