Class won't compile

When I try to compile my class, I keep getting this error.

Quote:

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error CS0246: The type or namespace name 'Dictionary' could not be found (are your missing a using directive or an assembly reference?)

error CS0246: The type or namespace name 'dict' could not be found (are you missing a using directive or an assembly reference?)

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I am writing the code in notepad and compiling with the command line.

here's my code

Code:

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using System;
using System.Collections;

class CH1_12 {

        public static void Main()
        {
                Dictionary dict = new Dictionary();

                dict.Add(1, "C++");
                dict.Add(2, "C");
                dict.Add(3, "Ada");
                dict.Add(4, "APL");
                dict.Add(5, "VB");
                dict.Add(6, "C#");
                dict.Add(7, "Java");
                dict.Add(8, "FORTRAN");

                //Print out the list
                Console.WriteLine("Before Deleting Anything");
               
                foreach(DictionaryEntry de in dict)
                {
                        Console.WriteLine("Entry Key {0} Value {1}", de.Key, de.Value);
                }

                dict.Remove(4);
                dict.Remove(7);
       
                Console.WriteLine("After Deletions");
               
                foreach(DictionaryEntry de in dict)
                {
                        Console.WriteLine("Entry Key {0} Value {1}", de.Key, de.Value);
                }               

        }
}

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and ideas on what's going on?????

There is no Dictionary class. There is only a DictionaryBase, and its an abstract class.

Blame it on the old ass book!

just ran into another problem with the book with converting data types

this works

Code:

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string s1 = "123.45"

single sngl1 = Convert.ToSingle(s1);
int i1 = Convert.ToInt16(sngl1);

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but the books way doesn't work

Code:

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string s1 = "123.45"

single sngl1 = s1.ToSingle();
int i1 = sngl1.ToInt16();

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BTW, how to I get the above Dictionary code to work???
DictionaryBase doesn't have Add, Remove or Insert Methods... but IDictionary has .Add and .Remove methods.

You can use a Hastable or a SortedList. IDictionary is the interface you would have to inherit if you want to implement its methods in your own custom class, so it cant be instantiated.

good, I am familiar with the hashtable... thanks for the help devgrp!