c#怎么用代码新建文件夹和遍历文件夹

Directory.CreateDirectory()

Directory.GetDirectoris()

问题一：
using System.IO;

fileStream fs =new fliestream("路径名",fileMode.create);
streamwriter sw=new streamwriter(fs);
sw.write(content);
sw.close();
fs.close();

问题二：

private void Form1_Load(object sender, EventArgs e)
{
try
{
string[] rootstr = Directory.GetLogicalDrives(); //得到系统的驱动器
foreach (string rootdrive in rootstr)
{

TreeNode tn = new TreeNode(rootdrive);
treeView1.Nodes.Add(tn); //将系统驱动器添加到树的节点上
ImageList kk = new ImageList();
//kk.Images.Add()
getDinfo(tn); //得到各个驱动器的下一级目录
}
}