write fileversion to csv format file.

FileInfo.cs

using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;

namespace FileInfos
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.ReadKey();
            GetFileInfoUnderDir(args[0]);
        }

        static string[] TargetInfos = {
            "CompanyName",
            "FileVersion",
            "FileDescription",
            "LegalCopyright",
            "InternalName",
            "Language",
            "OriginalFilename",
            "ProductName",
            "ProductVersion",
        };

        static void GetFileInfoUnderDir(string dirPath)
        {
            var dirInfo = new DirectoryInfo(dirPath);
            if (!dirInfo.Exists)
            {
                return;
            }
            var fileInfos = dirInfo.EnumerateFiles();
            using (var writer = new StreamWriter(new FileStream(dirPath + Path.DirectorySeparatorChar + "GetInfo.csv",
                FileMode.Create, FileAccess.Write, FileShare.None), Encoding.GetEncoding(932)))
            {
                foreach (var fInfo in fileInfos)
                {
                    var ext = fInfo.Extension;
                    if (ext.ToLower() == ".exe" || ext.ToLower() == ".dll" || ext.ToLower() == ".sys")
                    {
                        var version = GetFileVersions(fInfo.FullName);
                        writer.WriteLine($"{fInfo.Name},{version ?? ""}");
                    }
                }
            }

        }
        static string GetFileVersions(string filePath)
        {
            if (!new FileInfo(filePath).Exists)
            {
                return null;
            }
            var verInfo = FileVersionInfo.GetVersionInfo(filePath);
            var sb = new StringBuilder();
            foreach (var target in TargetInfos)
            {
                var getProp = typeof(FileVersionInfo).GetProperty(target);
                var prop = getProp.GetValue(verInfo);
                sb.Append($",\"{prop}\"");
            }
                sb.Append($",\"{File.GetLastAccessTime(filePath)}\"");
            return Regex.Replace(sb.ToString(), @"\A,", "");
        }
    }
}