using System.Net;
using System.Net.Sockets;

        public static void connect1(string host, int startPort, int finishPort)
        {

            IPAddress[] IPs = Dns.GetHostAddresses(host);
            Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            Console.WriteLine("Establishing Connection to {0}", host);

            for (int curPort = startPort; curPort <= finishPort; curPort++)
            {

                try
                {
                    s.Connect(IPs[0], curPort);
                    Console.WriteLine("Port {0} : opened", curPort);
                }
                catch
                {
                    Console.WriteLine("Port {0} : blocked", curPort);
                }
            }
        }

• Page and Server Control Processing
• State management
• Data access
• Web applications
• Coding practices

1.Simple.tld เป็น Description ของ tag library

<!DOCTYPE taglib
  PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
   "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">

    <!-- a tab library descriptor -->
<taglib xmlns="http://java.sun.com/JSP/TagLibraryDescriptor">
  <tlib-version>1.0</tlib-version>
  <jsp-version>1.2</jsp-version>
  <short-name>Mark's Simple Tags</short-name>

  <tag>
    <name>ZengTag</name>
    <tag-class>test.HelloWorldTag</tag-class>
    <body-content>empty</body-content>
    <attribute>
      <name>myName</name>
    </attribute>
  </tag>
</taglib>

   static string[] SplitCSV(string s)
        {
            List<string> list = new List<string>();
            StringBuilder work = new StringBuilder();
            for (int i = 0; i < s.Length; i++)
            {
                char c = s[i];
                if (c == '"')
                {
                    int p2;
                    while (true)
                    {
                        p2 = s.IndexOf('"', i + 1);
                        work.Append(s.Substring(i + 1, p2 - i - 1));
                        i = p2;

                        // If this is a double quote, keep going!
                        if (((p2 + 1) < s.Length) && (s[p2 + 1] == '"'))
                        {
                            work.Append('"');
                            i++;

                            // otherwise, this is a single quote, we're done
                        }
                        else
                        {
                            break;
                        }
                    }
                }
                else if (c == ',')
                {
                    list.Add(work.ToString());
                    work.Length = 0;
                }
                else
                {
                    work.Append(c);
                }
            }
            list.Add(work.ToString());
            return list.ToArray();
        }

 class SampleClass
    {
        public void Call1(String str)
        {
            MessageBox.Show("Call1 : " + str);
        }//

        public void Call2(String str)
        {
            MessageBox.Show("Call2 : " + str);
        }//

    }////

ต้องการ create object ของ คลาส SampleClass เรียกใช้ Method Call1 ได้ดังนี้ครับ

.........................

Button btn;

btn = new Button();
.....
btnAdd.Click += new EventHandler(btn_Click);
......

void btn_Click(object sender, EventArgs e) {
 MessageBox.Show("Hello World");
}

เราสามารถใช้ Feature ด้าน Anonamous Method ได้ดังนี้คือ

Button btn;

btn = new Button();
.....
btnAdd.Click += delegate(object sender, EventArgs e){  MessageBox.Show("Hello World"); }

หรือ จะละทิ้ง signature ของ Anonamous Method ก็ได้

btnAdd.Click += delegate {  MessageBox.Show("Hello World"); }
......

        //ประกาศ ตัวแทนชื่อ MyDelegate ที่จะทำงานแทน Method ที่ไม่มีการคืนค่าและรับ parameter 1 ตัวมีชนิดเป็น String
        public delegate void MyDelegate(String str);

        public void ShowMyName(String name)
        {
            MessageBox.Show("My name is "+name);
        }//

          //ประกาศตัวแทนของ MyDelegate ชื่อว่า CallDelegate โดยทำหน้าที่แทน Method ที่ชื่อว่า ShowMyName
          MyDelegate CallDelegate = new MyDelegate(ShowMyName);
          CallDelegate("Chiwa");

ผลก็จะมี Message Box ขึ้นโชว์ว่า My name is Chiwa

 namespace Builder
{
    public abstract class Animal
    {
        public String name;
        public String myFood;
        public String leg;
        public String animalType;
       
       

        public String getInformation()
        {
            return "I am " + this.animalType +"\n"+this.leg+ "\n My name is " + this.name + "\n I eat an " + this.myFood;
        }

    }//Animal

    public class Monkey : Animal
    {

        public Monkey()
        {
            this.animalType = "Monkey";
            this.myFood = "Banana";
        }


    }//Monkey

    public class Bird : Animal
    {
        public Bird()
        {
            this.animalType = "Bird";
            this.myFood = "Worm";
        }

       
    }//Bird


   public abstract class AnimalBuilder
   {
       public Animal aAnimal;
       public abstract void BuildName(String name);
       public abstract void BuildLeg();
   }//AnimalBuilder

   public class MonkeyBuilder : AnimalBuilder
   {
       public MonkeyBuilder()
       {
           aAnimal = new Monkey();
       }

       public override void BuildName(String name)
       {
           aAnimal.name = name;
       }

       public override void BuildLeg()
       {
           aAnimal.leg = "My leg was build for 4 legs "+MonkeyBuilderSpecial.MakeSpecial();
       }
   }//MonkeyBuilder

  public class MonkeyBuilderSpecial
  {
      public static String MakeSpecial()
      {
          return ", but i can walk by 2 legs.";
      }
  }

   public class BirdBuilder : AnimalBuilder
   {
       public BirdBuilder()
       {
           aAnimal = new Bird();
       }

       public override void BuildName(String name)
       {
           aAnimal.name = name;
       }

       public override void BuildLeg()
       {
           aAnimal.leg = "My leg was build for 2 legs";
       }
   }//MonkeyBuilder

    public class AnimalConstructor
    {
        public String name {get; set;}
        public void MakeAnimal(AnimalBuilder animalBuilder)
        {
            animalBuilder.BuildName(this.name);
            animalBuilder.BuildLeg();
        }
    }


}//Builder

..................................