WriteToTextFile

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace TextFileIO
{
    class Program
    {
        static void Main(string[] args)
        {
            string folder = @"C:\Parentfolder\Childfolder3\";
            string filename = "Datafile.txt";
            string fullPath = folder + filename;

            Console.WriteLine("Write File\n");
            List<string> addData = new List<string>();
            addData.Add("Lloyd Samuel,Garcia,Cebu City,lloydgarcia123@gail.com,09224542311");
            File.WriteAllLines(fullPath, addData);
            Console.WriteLine("All entries written\n");

            //Display
            Console.WriteLine("Read File\n");

            List<string> list = File.ReadAllLines(fullPath).ToList();
            List<PersonInfo> people = new List<PersonInfo>();
            foreach (var line in list)
            {
                string[] entries = line.Split(',');
                PersonInfo newPerson = new PersonInfo();
                newPerson.FirstName = entries[0];
                newPerson.LastName = entries[1];
                newPerson.Address = entries[2];
                newPerson.Email = entries[3];
                newPerson.Contact = entries[4];
                people.Add(newPerson);
            }
            foreach (var person in people)
            {
                Console.WriteLine($"{ person.FirstName}, { person.LastName}, { person.Address}, { person.Email}, { person.Contact}");
            }
            Console.ReadLine();
        }
    }
}