public Dictionary<string, DirectoryHolder> GetAllFolders()
{
foreach (var folder in directoryHolders)
{
Destroy(folder.Value.Button);
}
directoryHolders.Clear ();
var newDirManager = new DirectoryManager();
newDirManager.SetDictionary = directoryHolders;
return newDirManager.GetAllDirectories (FolderButton);
}