I want C# to read one random line from a .txt file (low two digit numbers of entries on the largest files with less than 35 characters).

I used File.AppendAllText to write to .txt files before. I tried a few solutions, but they don’t seem to work for me here. Unfortunately, I’m not the best at coding.

using System;
using System.IO;

public class CPHInline
{
    public bool Execute()
    {
        //This will get the folder path for the file that is supposed to be read in format "X:FolderFolder2".
        string pathF = CPH.GetGlobalVar<string>("File path", true);
        //This contains the file name which changes sometimes. This variable combines the folder path and file path to the final path.
        string path = $"{pathF}Medium.txt";
        //The string "message" is supposed to contain the random read line.
        string message = //The read random line from the .txt file is supposed to be a the value of the variable.
        //From here on out, this is the part where the random line get's processed further. 
        string voice = CPH.GetGlobalVar<string>("TTS speaker", true);
        
        CPH.SendMessage(message, false);
        CPH.TtsSpeak(voice, message, false);
        return true;
    }
}