public DataImporter(string filePath)
 {
     fileLoader    = new FileLoader();
     this.filePath = filePath;
 }
 private void FileLoad(FileLoader fileLoader, DataTable dt)
 {
     fileLoader.FilePath = filePath;
     fileLoader.Load(dt);
 }
 public DataImporter()
 {
     fileLoader = new FileLoader();
 }