log4net SDK Reference |

# PropertyFilter.Key Property

The key to lookup in the event properties and then match against.

[Visual Basic]
Public Property Key As String
[C#]
public string Key {get; set;}

#### Remarks

The key name to use to lookup in the properties map of the LoggingEvent. The match will be performed against the value of this property if it exists.

#### See Also

PropertyFilter Class | log4net.Filter Namespace