Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Text.Json;

namespace testfs
{
    class Program
    {
        public static void Main(string[] args)
        {
            for (var i=0; i<10; i++)
            {
                CreateAllFiles();
                ReadAllFiles();
                DeleteAllFiles();
                ReadAllFiles();
                CreateAllFiles();
                ReadAllFiles();
            }
        }

        private static string Root = Path.GetFullPath("temp");

        private static string[] Paths = new string[] {
            "firstFile.txt",
            "FirstLevelDirectory\\secondFile.txt",
            "FirstLevelDirectory\\SecondLevelDirectory\\thirdFile.txt",
            "FirstLevelDirectory\\SecondLevelDirectory\\ThirdLevelDirectory\\fourthFile.txt",
            "FirstLevelDirectory\\SecondLevelDirectory\\ThirdLevelDirectory\\1611678346913_20_INDIA - 6C - Login page - NETWORKING LOUNGE (f5e6955f-d106-4ebb-b46a-a83e9cd0845d).txt",
        };

        public static void DeleteAllFiles()
        {
            Console.WriteLine("Deleting files");

            var errors = new Dictionary<string, string>();

            foreach (var info in new DirectoryInfo(Root).GetFileSystemInfos())
            {
                if (info is FileInfo file)
                {
                    try
                    {
                        File.Delete(file.FullName);
                    }
                    catch (Exception e)
                    {
                        errors.Add(info.FullName, e.Message);
                    }
                }
                else if (info is DirectoryInfo dir)
                {
                    try
                    {
                        Directory.Delete(dir.FullName, true);
                    }
                    catch (Exception e)
                    {
                        errors.Add(info.FullName, e.Message);
                    }
                }
            }

            if (errors.Count > 0)
            {
                Console.WriteLine("Errors:");
                WriteContents(errors);
            }
        }

        public static void CreateAllFiles()
        {
            Console.WriteLine("Creating files");

            var errors = new Dictionary<string, string>();

            foreach (var path in Paths)
            {
                var filename = Path.Combine(Root, path);

                var dirPath = Path.GetDirectoryName(filename);

                if (!Directory.Exists(dirPath))
                {
                    Directory.CreateDirectory(dirPath);
                }

                try
                {
                    using var fs = File.CreateText(filename);
                    fs.WriteLine("hello world");
                }
                catch (Exception e)
                {
                    errors.Add(path, e.Message);
                }
            }

            if (errors.Count > 0)
            {
                Console.WriteLine("Errors:");
                WriteContents(errors);
            }
        }

        public static void ReadAllFiles()
        {
            Console.WriteLine("Reading files");

            var contents = new Dictionary<string, string>();

            foreach (var path in Paths)
            {
                var filename = Path.Combine(Root, path);

                try
                {
                    if (File.Exists(filename))
                    {
                        contents.Add(path, File.ReadAllText(filename));
                    }
                }
                catch (Exception e)
                {
                    contents.Add(path, e.Message);
                }
            }
            
            Console.WriteLine("Results:");
            WriteContents(contents);
        }

        public static void WriteContents(object content)
        {
            Console.WriteLine(JsonSerializer.Serialize(content, new JsonSerializerOptions { WriteIndented = true }));
        }
    }
}