log4net SDK Reference |

# BufferingAppenderSkeleton.Evaluator Property

Gets or sets the ITriggeringEventEvaluator that causes the buffer to be sent immediately.

[Visual Basic]
Public Property Evaluator As ITriggeringEventEvaluator
[C#]
public log4net.Core.ITriggeringEventEvaluator Evaluator {get; set;}

#### Property Value

The ITriggeringEventEvaluator that causes the buffer to be sent immediately.

#### Remarks

The evaluator will be called for each event that is appended to this appender. If the evaluator triggers then the current buffer will immediately be sent (see SendBuffer).

If Lossy is set to `true` then an Evaluator must be specified.

#### See Also

BufferingAppenderSkeleton Class | log4net.Appender Namespace