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Collections in C#.net

Posted By:Narayanan       Posted Date: September 26, 2011    Points: 200    Category: C#    URL: http://www.dotnetspark.com  

Here, we discussed about Collection in .Net framework. I explain How to use System. Collections in C#.net? and what are the Collections? and How to use Array List in C#.net?
 

 

  What is mean by Collections?

          Collections contain number of  classes  to required for storing group of related objects.

 

What are the Collections Classes?

1)    Array List

2)    Queue

3)    Stack

4)     StringCollection

5)    BitArray

 

1)    Array List:

            Can Store any type of object.

            Expand to any required capacity

 

2)    Queue:

First in First Out (FIFO) Collection.

      On messaging server to store messages temp before Processing

 

3)    Stack:

     Last in First Out (LIFO) Collection.

     Stack to track change so that the most recent change can be undone.

 

 

4)    StringCollection:

                     Like ArrayList, except values are strongly typed as a strings.

                      Does not support Sorting.

                

5)    BitArray:

                       A collection of Boolean values.

           

ArrayList:

   Now, we discussed about How to use Arraylist.Add Method in C#.net?

//Namespace

Using System.Collections

// Coding

ArrayList ArrayLst = new ArrayList ()

ArrayLst.Add("Hello");

ArrayLst.Add ("World");

foreach (Object Obj in ArrayLst)

         Console.WriteLine (Obj.Tostring ())

Output:

  Hello World


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