using System;

using System.Collections;

using System.Text;

public class SamplesHashtable {

public static void Main() {

// Create and initialize a new Hashtable.

Hashtable table = new Hashtable();

//Student Name, Grade

table.Add("Jay", 100);

table.Add("Brian", 87);

table.Add("Rajesh", 92);

table.Add("Bill", 76);

table.Add("Brad", 84);

table.Add("Kit", 91);

table.Add("Vinaya", 80);

table.Add("Lakshan", 87);

// Display the properties and values of the Hashtable.

Console.WriteLine("Count: {0}", table.Count );

PrintTable( table );

Console.WriteLine();

int g = (int) table["Jay"];

Console.WriteLine ("Jay's grade is: {0}", g);

Console.WriteLine();

PrintItems ("All Names", table.Keys);

Console.WriteLine();

PrintItems ("All Grades", table.Values);

}

public static void PrintTable( Hashtable myList ) {

Console.WriteLine ("{0,-8} {1,-8}", "Name","Grade");

Console.WriteLine ("{0,-8} {1,-8}", "----","-----");

foreach (DictionaryEntry e in myList) {

Console.WriteLine ("{0,-8} {1,-8}", e.Key, e.Value);

}

}

public static void PrintItems(string title, IEnumerable myList ) {

Console.Write ("{0}: ", title);

StringBuilder sb = new StringBuilder();

foreach (object o in myList) {

sb.AppendFormat( "{0}, ", o);

}

sb.Remove (sb.Length-2,2);

Console.WriteLine(sb);

}

}