Format of the range key. The default is "{Time}".
            The format can include environment variables, attributes from the logged message, or can
            be a constant value.
            
            Environment variables are specified like so: %Time%
            Attributes are specified like so: {Time}
            
            Config key: RangeKeyFormat
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string RangeKeyFormat { get; set; }