Resizable Text

Hi,
I want to display app logs at scrollContent.
I have list of logs where log is :

Code (CSharp):

1. public class Log
2. {
3.       public string LogType {get; set;}
4.       public LogType LogType {get; set}
5. }

To display log message should I use string or StringBuilder at one Text component with supporting richText or make Text prefab foreach list element?
How to use scrollContent and Text? It should resize depend on text lenght