public IEnumerable<FileViewModel> UpStairs(PathModel path)
 {
     var filePath = ApplicationFileManager.Decode(path.Path);
     IList<FileViewModel> files = new List<FileViewModel>();
     if (filePath == "root") files = ApplicationFileManager.GetRootDirectories();
     else if (Directory.Exists(filePath))
     {
         var di = new DirectoryInfo(filePath);
         files = di.Parent != null
             ? ApplicationFileManager.GetFiles(di.Parent.FullName)
             : ApplicationFileManager.GetRootDirectories();
     }
     return files;
 }
 public IEnumerable<FileViewModel> Post(PathModel path)
 {
     return ApplicationFileManager.GetFiles(path.Path);
 }