SNTP Client in C#

<br />
		// Connect to the time server and update system time<br />
		public void Connect(bool UpdateSystemTime)<br />
		{<br />
			Socket s = null;<br />
<br />
			using(s) <br />
			{<br />
				IPHostEntry hostadd = Dns.Resolve(TimeServer);<br />
				IPEndPoint EPhost = new IPEndPoint(hostadd.AddressList[0], 123);<br />
<br />
				s = new Socket(EPhost.Address.AddressFamily, SocketType.Dgram, ProtocolType.Udp);<br />
<br />
				// Sets the send timeout<br />
				s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 8000);<br />
				// Initialize data structure<br />
				Initialize();<br />
				// Sends datagram to the IpEndPoint specified. This call blocks. <br />
				s.SendTo(NTPData, EPhost);<br />
    <br />
				// Creates an IpEndPoint to capture the identity of the sending host.<br />
				IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);<br />
				EndPoint tempRemoteEP = (EndPoint)sender;<br />
<br />
				// Sets the recieve timeout to 15 seconds. If the time server has not responded <br />
				// within that time, then the operation times out and throws a socket exception.<br />
				s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 15000);<br />
				// Receives datagram from a remote host.  This call blocks.<br />
				s.ReceiveFrom(NTPData, ref tempRemoteEP);<br />
				if(!IsResponseValid())<br />
				{<br />
					throw new Exception("Invalid response from " + TimeServer);<br />
				}<br />
<br />
				// Update system time<br />
				if(UpdateSystemTime)<br />
				{<br />
					SetTime();<br />
				}<br />
			}<br />
<br />
		}<br />
<br />

static uint Get32Bits(byte[] data, int startIndex)
{
	byte[] tmp = new byte[4];
	Array.Copy(data, startIndex, tmp, 0, 4);
	if (BitConverter.IsLittleEndian)
		Array.Reverse(tmp);
	return BitConverter.ToUInt32(tmp, 0);
}