Format of the hash key. The default is "{Host}". The format can include environment variables, attributes from the logged message, or can be a constant value. Environment variables are specified like so: %ComputerName% Attributes are specified like so: {Host} For example: {Host}-{EventType}-{ProcessId} or %ComputerName%-{EventType}-{ProcessId} Config key: HashKeyFormat

public string HashKeyFormat { get; set; }