new System.IO.DirectoryInfo(@"C:\Temp").Delete(true);

 //Or

 System.IO.Directory.Delete(@"C:\Temp", true);

从主机调用

static void Main(string[] args)
{ 
   string Filepathe =<Your path>
   DeleteDirectory(System.IO.Directory.GetParent(Filepathe).FullName);              
}

添加此方法

public static void DeleteDirectory(string path)
{
    if (Directory.Exists(path))
    {
        //Delete all files from the Directory
        foreach (string file in Directory.GetFiles(path))
        {
            File.Delete(file);
        }
        //Delete all child Directories
        foreach (string directory in Directory.GetDirectories(path))
        {
             DeleteDirectory(directory);
        }
        //Delete a Directory
        Directory.Delete(path);
    }
 }

System.IO.Directory.Delete(installPath, true);
System.IO.Directory.CreateDirectory(installPath);

private void ClearDirectory(string path)
{
    if (Directory.Exists(path))//if folder exists
    {
        Directory.Delete(path, true);//recursive delete (all subdirs, files)
    }
    Directory.CreateDirectory(path);//creates empty directory
}

以下代码将递归清除文件夹：

private void clearFolder(string FolderName)
{
    DirectoryInfo dir = new DirectoryInfo(FolderName);

    foreach(FileInfo fi in dir.GetFiles())
    {
        fi.Delete();
    }

    foreach (DirectoryInfo di in dir.GetDirectories())
    {
        clearFolder(di.FullName);
        di.Delete();
    }
}

以下代码将清理目录，但将根目录保留在那里（递归）。

Action<string> DelPath = null;
DelPath = p =>
{
    Directory.EnumerateFiles(p).ToList().ForEach(File.Delete);
    Directory.EnumerateDirectories(p).ToList().ForEach(DelPath);
    Directory.EnumerateDirectories(p).ToList().ForEach(Directory.Delete);
};
DelPath(path);