开发wince程序，Debug下，报现有连接被远程主机强行关闭，但是直接打开程序就没问题

[Ringo_Lee]

System.Net.ServicePointManager.DefaultConnectionLimit = 100;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(builder.ToString());
HttpWebResponse response = null;
try
{
request.Method = "GET";
request.ContentType = "text/html;charset=UTF-8";
request.Timeout = 5 * 60 * 1000;
request.KeepAlive = false;
response = (HttpWebResponse)request.GetResponse();
string result;
Stream s = response.GetResponseStream();
StreamReader reader = new StreamReader(s, Encoding.GetEncoding("utf-8"));
return reader.ReadToEnd();
//return result;

}
catch (Exception ex)
{
string a = ex.Message;
return null;
}
finally
{
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}

以上代码，求大神解答