C# 创建子文件夹

 1    private void GreateFile(string directoryPath, string fileName)
 2         {
 3             //directoryPath一个路径变量
 4             //fileName文夹名字
 5             try
 6             {
 7                 // Determine whether the directory exists.
 8                 if (Directory.Exists(directoryPath))
 9                 {
10                     DirectoryInfo dir = new DirectoryInfo(directoryPath);
11                     dir.CreateSubdirectory(fileName);
12                 }
13             }
14             catch (Exception e)
15             {
16                 MessageBox.Show("请确认根目录是否存在!");
17                 return;
18             }
19             finally { }
20         }