C#.NET 實現程式自動更新

 1 public static string RemoteVersion(string url)
 2 {
 3     string rv = "";
 4             
 5     System.Net.HttpWebRequest req = (System.Net.HttpWebRequest)
 6         System.Net.WebRequest.Create(url);
 7     System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)req.GetResponse();
 8     System.IO.Stream receiveStream = response.GetResponseStream();
 9     System.IO.StreamReader readStream = new System.IO.StreamReader(receiveStream, Encoding.UTF8);
10     string s = readStream.ReadToEnd();
11     response.Close();
12     if (ValidateFile(s))
13     {
14         rv = s;
15     }
16     return rv;
17 }