log4net SDK Reference |

# AppenderSkeleton.PreAppendCheck Method

Called before Append as a precondition.

[Visual Basic]
Overridable Protected Function PreAppendCheck() As Boolean
[C#]
protected virtual bool PreAppendCheck();

#### Return Value

`true` if the call to Append should proceed.

#### Remarks

This method is called by DoAppend before the call to the abstract Append method.

This method can be overridden in a subclass to extend the checks made before the event is passed to the Append method.

A subclass should ensure that they delegate this call to this base class if it is overridden.

#### See Also

AppenderSkeleton Class | log4net.Appender Namespace