菜鸟求助【基于UDP协议的SOCKET】

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;namespace SocketUDPClient2
{
    class Program
    {
        public class Client_Th
        {
            static void Main(string[] args)throws IOException
            {
                DatagramSocket socket=new DatagramSocket();//创建套接字
                byte buf[]=new Byte [256];
                InetAddress=InetAddress.getByName("192.168.1.108");//服务器IP
                DatagramPacket packet=new DatagramPacket(buf,buf,Length,address,2000);//创建要发送的数据报对象
                socket.send(packet);//发送数据报
                packet=new DatagramPacket(buf,buf,length);//创建要接收的数据包对象
                socket.receive(packet);//接收数据报
                String receive=new String(packet getData());
                System.out.println("The string receive from server:"+receive);
                Socket.close();            }
        }
    }
}我想用数据报Socket做一个与平板通信的PC客户端,这样写在throws和Datagram那里会报错= =？
UDPsocket