Handle Windows time server

I this code where I get realtime from time.windows.com..this code I got from forum too
but sometimes I got error "SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond." and it was from Line 27... any idea how to handle that? I want to call GetNetworkTime(); again if it gives an error

Code (CSharp):

1.  
2. public static DateTime GetNetworkTime()
3.   {
4.     //default Windows time server
5.     const string ntpServer = "time.windows.com";
6.  
7.     // NTP message size - 16 bytes of the digest (RFC 2030)
8.     var ntpData = new byte[48];
9.  
10.     //Setting the Leap Indicator, Version Number and Mode values
11.     ntpData[0] = 0x1B; //LI = 0 (no warning), VN = 3 (IPv4 only), Mode = 3 (Client Mode)
12.  
13.     var addresses = Dns.GetHostEntry(ntpServer).AddressList;
14.  
15.     //The UDP port number assigned to NTP is 123
16.     var ipEndPoint = new IPEndPoint(addresses[0], 123);
17.     //NTP uses UDP
18.  
19.     using (var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))
20.     {
21.       socket.Connect(ipEndPoint);
22.  
23.       //Stops code hang if NTP is blocked
24.       socket.ReceiveTimeout = 3000;
25.  
26.       socket.Send(ntpData);
27.       socket.Receive(ntpData);
28.       socket.Close();
29.     }