c# 获取网络标准时间

public static DateTime DataStandardTime()
{//返回国际标准时间
//只使用的时间服务器的IP地址，未使用域名
string[,] 时间服务器 = new string[14, 2];
int[] 搜索顺序 = new int[] { 3, 2, 4, 8, 9, 6, 11, 5, 10, 0, 1, 7, 12 };
时间服务器[0, 0] = "time-a.nist.gov";
时间服务器[0, 1] = "129.6.15.28";
时间服务器[1, 0] = "time-b.nist.gov";
时间服务器[1, 1] = "129.6.15.29";
时间服务器[2, 0] = "time-a.timefreq.bldrdoc.gov";
时间服务器[2, 1] = "132.163.4.101";
时间服务器[3, 0] = "time-b.timefreq.bldrdoc.gov";
时间服务器[3, 1] = "132.163.4.102";
时间服务器[4, 0] = "time-c.timefreq.bldrdoc.gov";
时间服务器[4, 1] = "132.163.4.103";
时间服务器[5, 0] = "utcnist.colorado.edu";
时间服务器[5, 1] = "128.138.140.44";
时间服务器[6, 0] = "time.nist.gov";
时间服务器[6, 1] = "192.43.244.18";
时间服务器[7, 0] = "time-nw.nist.gov";
时间服务器[7, 1] = "131.107.1.10";
时间服务器[8, 0] = "nist1.symmetricom.com";
时间服务器[8, 1] = "69.25.96.13";
时间服务器[9, 0] = "nist1-dc.glassey.com";
时间服务器[9, 1] = "216.200.93.8";
时间服务器[10, 0] = "nist1-ny.glassey.com";
时间服务器[10, 1] = "208.184.49.9";
时间服务器[11, 0] = "nist1-sj.glassey.com";
时间服务器[11, 1] = "207.126.98.204";
时间服务器[12, 0] = "nist1.aol-ca.truetime.com";
时间服务器[12, 1] = "207.200.81.113";
时间服务器[13, 0] = "nist1.aol-va.truetime.com";
时间服务器[13, 1] = "64.236.96.53";
int portNum = 13;
string hostName;
byte[] bytes = new byte[1024];
int bytesRead = 0;
System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
for (int i = 0; i < 13; i++)
{
hostName = 时间服务器[搜索顺序[i], 1];
try
{
client.Connect(hostName, portNum);
System.Net.Sockets.NetworkStream ns = client.GetStream();
bytesRead = ns.Read(bytes, 0, bytes.Length);
client.Close();
break;
}
catch (System.Exception)
{
}
}
char[] sp = new char[1];
sp[0] = ' ';
System.DateTime dt = new DateTime();
string str1;
str1 = System.Text.Encoding.ASCII.GetString(bytes, 0, bytesRead);

string[] s;
s = str1.Split(sp);
dt = System.DateTime.Parse(s[1] + " " + s[2]);//得到标准时间
dt = dt.AddHours(8);//得到北京时间*/
return dt;

}