class Program    {        static void Main(string[] args)        {            int totalLineCount = 0;            string directory;            if(args.Length>0)            {                directory = args[0];            }            else            {                directory = Directory.GetCurrentDirectory();            }            directory = @"F:\workdocs";            Console.WriteLine(directory);            totalLineCount = DirectoryCountLines(directory);            System.Console.WriteLine(totalLineCount);            Console.ReadLine();        }        static int DirectoryCountLines(string directory)        {            int lineCount = 0;            foreach(string file in Directory.GetFiles(directory,"*.cs"))            {                lineCount += CountLines(file);            }            foreach(string subdirectory in Directory.GetDirectories(directory))            {                lineCount += DirectoryCountLines(subdirectory);            }            return lineCount;        }        private static int CountLines(string file)        {            string line;            int lineCount = 0;            FileStream stream = new FileStream(file,FileMode.Open);            StreamReader reader = new StreamReader(stream);            line = reader.ReadLine();            while(line!=null)            {                if(line.Trim()!="")                {                    lineCount++;                }                line = reader.ReadLine();            }            reader.Close();            return lineCount;        }    }