1:  //using MySql.Data.MySqlClient;

   2:   

   3:  MySqlConnection dbconn=new MySqlConnection(connstr);

   4:  MySqlCommand sqlcmd = new MySqlCommand("select * from customers", dbconn);

   5:  MySqlDataReader reader = sqlcmd.ExecuteReader();

   6:  int colcnt=reader.FieldCount;

   7:  while (reader.Read()) {

   8:      for(int i=0;i<colcnt;i++) {

   9:          Console.Write(reader.GetValue(i)+"\t");//write columns

  10:      }

  11:      Console.Write("\n");//end row

  12:  }

  13:  reader.Close();

  14:  dbconn.Close();    

   1:  string[] drives=Directory.GetLogicalDrives();

   2:  if (drives!=null && drives.Length>0)

   3:  {

   4:      foreach(string drive in drives)

   5:      Console.WriteLine(drive);

   6:  }

   1:  TcpClient tcpclnt = new TcpClient();

   2:  Console.WriteLine("Connecting.....");

   3:              

   4:  tcpclnt.Connect("192.168.1.96",6666);

   5:              

   6:  Console.WriteLine("Connected");

   7:  Console.Write("Enter the string to be transmitted : ");

   8:              

   9:  String str=Console.ReadLine();

  10:  Stream stm = tcpclnt.GetStream();

  11:                          

  12:  ASCIIEncoding asen= new ASCIIEncoding();

  13:  byte[] ba=asen.GetBytes(str);

  14:  Console.WriteLine("Transmitting.....");

  15:              

  16:  stm.Write(ba,0,ba.Length);

  17:              

  18:  byte[] bb=new byte[100];

  19:  int k=stm.Read(bb,0,100);

  20:              

  21:  for (int i=0;i<k;i++)

  22:      Console.Write(Convert.ToChar(bb[i]));

  23:              

  24:  tcpclnt.Close();

   1:  ArrayList hkeys=new ArrayList();

   2:   

   3:  hkeys.Add(Registry.ClassesRoot);

   4:  hkeys.Add(Registry.CurrentConfig);

   5:  hkeys.Add(Registry.CurrentUser);

   6:  hkeys.Add(Registry.DynData);

   7:  hkeys.Add(Registry.PerformanceData);

   8:  hkeys.Add(Registry.LocalMachine);

   9:  hkeys.Add(Registry.Users);

  10:   

  11:  foreach(RegistryKey hkey in hkeys) 

  12:  {

  13:      Console.WriteLine(hkey.Name);

  14:      ArrayList subkeys=new ArrayList();

  15:      subkeys.AddRange(hkey.GetSubKeyNames());

  16:      foreach(string sub in subkeys) {

  17:          Console.WriteLine("\t"+sub);

  18:      }

  19:  }