Basic UDP Client C# with Example

This code example creates a UDP client then sends "Hello World" across the network to the intended recipient. A 
listener does not have to be active, as UDP Is connectionless and will broadcast the message regardless. Once the 
message is sent, the clients work is done. 
byte[] data = Encoding.ASCII.GetBytes("Hello World"); 
string ipAddress = "192.168.1.141"; 
string sendPort = 55600; 
try 
{ 
using (var client = new UdpClient()) 
{ 
IPEndPoint ep = new IPEndPoint(IPAddress.Parse(ipAddress), sendPort); 
client.Connect(ep); 
client.Send(data, data.Length); 
} 
} 
catch (Exception ex) 
{ 
Console.WriteLine(ex.ToString()); 
} 
Below is an example of a UDP listener to complement the above client. It will constantly sit and listen for traffic on a 
given port and simply write that data to the console. This example contains a control flag 'done' that is not set 
internally and relies on something to set this to allow for ending the listener and exiting. 
bool done = false; 
int listenPort = 55600; 
using(UdpClinet listener = new UdpClient(listenPort)) 
{ 
IPEndPoint listenEndPoint = new IPEndPoint(IPAddress.Any, listenPort); 
while(!done) 
{ 
byte[] receivedData = listener.Receive(ref listenPort); 
Console.WriteLine("Received broadcast message from client {0}", listenEndPoint.ToString()); 
Console.WriteLine("Decoded data is:"); 
Console.WriteLine(Encoding.ASCII.GetString(receivedData)); //should be "Hello World" sent 
from above client 
} 
}