private TreeViewClass CreateNodeLoop(String selectedDirectory,int n)
        {
            TreeViewClass Node = new TreeViewClass(selectedDirectory);

            String[] subDirs = System.IO.Directory.GetDirectories(selectedDirectory,"*");
            
            foreach (String s in subDirs)
            {
                TreeViewClass addNode = new TreeViewClass(s);
                String[] subDirectorys2 = System.IO.Directory.GetDirectories(s,"*");
                foreach(String s2 in subDirectorys2)
                {
                    addNode.AddChild(new TreeViewClass(s2));
                }
                Node.AddChild(addNode);
                
            }
            return Node;
        }
 /*****************************************************************************************************************************
  * 再帰を用いたNode作成
  * 必要なし。でもたまに使うから取っておく
  * ***************************************************************************************************************************/
 private TreeViewClass CreateNode(String selectedDirectory, int n)
 {
     TreeViewClass Node = new TreeViewClass(selectedDirectory);
     String[] subDirectorys = System.IO.Directory.GetDirectories(selectedDirectory, "*");
     if (n > 5)
     {
         return Node;
     }
     foreach (String s in subDirectorys)
     {
         Node.AddChild(CreateNode(s, n + 1));
     }
     return Node;
 }