c#如何在生成文件夹或者文件时候自动重命名

 1   private void btnAdd_Click(object sender, EventArgs e)
 2         {
 3             string dir = @"d:\KuGouCache\abc";
 4             string newdir = dir;
 5             int i = 0;
 6             while (Directory.Exists(newdir))
 7             {
 8                 newdir = dir + "(" + i + ")";
 9                 i++;
10             }
11             Directory.CreateDirectory(newdir);
12         }

  private void btnAdd_Click(object sender, EventArgs e)
        {
             string name = @"d:\KuGouCache\abc.txt";
            int pos = name.LastIndexOf(‘.‘);
            name = name.Insert(pos, "({0})");

            int i = 0;
            var newName = string.Format(name, i);
            while (File.Exists(newName))
            {
                newName = string.Format(name, i);
                i++;
            }
            File.Create(newName);
        }