[SerializableAttribute]
public sealed class Level : IComparable

<SerializableAttribute>
Public NotInheritable Class Level
	Implements IComparable

[SerializableAttribute]
public ref class Level sealed : IComparable

[<SealedAttribute>]
[<SerializableAttribute>]
type Level =  
    class
        interface IComparable
    end

The Level type exposes the following members.

	Name	Description
	Level(Int32, String)	Constructor
	Level(Int32, String, String)	Constructor

	Name	Description
	DisplayName	Gets the display name of this level.
	Name	Gets the name of this level.
	Value	Gets the value of this level.

	Name	Description
	Compare	Compares two specified Level instances.
	CompareTo	Compares this instance to a specified object and returns an indication of their relative values.
	Equals	Compares levels. (Overrides ObjectEquals(Object).)
	GetHashCode	Returns a hash code (Overrides ObjectGetHashCode.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	ToString	Returns the String representation of the current Level. (Overrides ObjectToString.)

	Name	Description
	Equality	Returns a value indicating whether two specified Level objects have the same value.
	GreaterThan	Returns a value indicating whether a specified Level is greater than another specified Level.
	GreaterThanOrEqual	Returns a value indicating whether a specified Level is greater than or equal to another specified Level.
	Inequality	Returns a value indicating whether two specified Level objects have different values.
	LessThan	Returns a value indicating whether a specified Level is less than another specified Level.
	LessThanOrEqual	Returns a value indicating whether a specified Level is less than or equal to another specified Level.

	Name	Description
	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.
	Log4Net_Debug	The Emergency level designates very severe error events. System unusable, emergencies.
	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.

Each LoggingEvent has an associated Level.

Levels have a numeric Value that defines the relative ordering between levels. Two Levels with the same Value are deemed to be equivalent.

The levels that are recognized by log4net are set for each ILoggerRepository and each repository can have different levels defined. The levels are stored in the LevelMap on the repository. Levels are looked up by name from the LevelMap.

When logging at level INFO the actual level used is not Info but the value of LoggerRepository.LevelMap["INFO"]. The default value for this is Info, but this can be changed by reconfiguring the level map.

Each level has a DisplayName in addition to its Name. The DisplayName is the string that is written into the output log. By default the display name is the same as the level name, but this can be used to alias levels or to localize the log output.

Some of the predefined levels recognized by the system are:

• Off.
• Fatal.
• Error.
• Warn.
• Info.
• Debug.
• All.

Reference