string path = @"D:\Temp\mzwu_com";
Directory.CreateDirectory(path);
File.SetAttributes(path, FileAttributes.Hidden); //没写错，就是File.SetAttributes

WebClient client = new WebClient();
client.DownloadFile("http://www.mzwu.com/test.mp3", @"G:\test.mp3");

string[] list = new string[] { @"F:\mzwu_com\sound1.wav", @"F:\mzwu_com\sound2.wav", @"F:\mzwu_com\sound3.wav" };

SoundPlayer player = new SoundPlayer();

/// <summary>
/// C#二维数组排列组合算法(每列取一个元素组合)
/// </summary>
/// <param name="args"></param>
/// <returns></returns>

static void Main(string[] args)

public void Navigate(string urlString, string targetFrameName, byte[] postData, string additionalHeaders);
public void Navigate(Uri url, string targetFrameName, byte[] postData, string additionalHeaders);

File.WriteAllText(@"D:\web\index.htm", "mzwu.com");
File.ReadAllText(@"D:\web\index.htm");