.net process File

var directory = AppDomain.CurrentDomain.BaseDirectory + "/NextUrl/";
if (!Directory.Exists(directory))
{
      \Directory.CreateDirectory(directory);

}

if (!File.Exists(path))
{
    using (StreamReader reader = new StreamReader(path, Encoding.UTF8))
     {
             url = reader.ReadToEnd();
      }

}

if (!File.Exists(path))

{
          using (StreamWriter sw = File.CreateText(path))
          {
                 sw.WriteLine(stringData);
          }
}

File.WriteAllText(path, nextUrl);

var directory =System.Web.Hosting.HostingEnvironment.MapPath(ConfigurationManager.AppSettings["CrawlInstanceFolder"]);
var dirInfo = new DirectoryInfo(directory);

DirectoryInfo[] dirs = aDir.GetDirectories();

FileInfo[] dirs = aDir.GetDirectories();