ArrayList Collection C#

ArrayList:

ArrayList is also a type of a collection. This data structure is also built in C#. ArrayList is just like an array which we use in C++ and c programming language. In ArrayList the data items are stored in consecutive memory locations. To explain ArrayList in C# let us consider the following example. Like all the other data structures ArrayList can be used in a c# program by including the library:

Using System.Collection.Generic;

Note: This library should not only be included in your main() but also in each class associated with your program.

Now make a class of Collection Test.
include System.collection.generic by.

Using System.Collection.Generic;

Now in the CollectionTest{} type the following code:

public void testArrayList()
{
     ArrayList array = new ArrayList();

//add item
// (ArrayList) is basically the data structure which we are using and(array) is an object of (ArrayList).
//=new ArrayList(); new shows that a new data structure of type ArrayList() is being created and it will be stored in the instance which is (array).

     array.Add("laptop");

//Add is basically the built in function in c# which is associated with (ArrayList). Anything typed in the brackets of Add() function will be added in (ArrayList).
//get item

     Console.Write(array[0].ToString());

//The above mentioned line will convert any item you want to add in ArrayList to String by  ToString() method.
//remove item

     array.Remove("laptop");

//Remove is basically the built in function in c# which is associated with (ArrayList). Anything typed in the brackets of Remove() function will be removed from (ArrayList).
//clear array

     array.Add("laptop");
     array.Add("TV");
     array.Add("computer");

     array.Clear();

//Clear is basically the built in function in c# which is associated with (ArrayList). Clear() clears the whole ArrayList.

}

public void testArrayList()

{

ArrayList array = new ArrayList();

//add item

// (ArrayList) is basically the data structure which we are using and(array) is an object of (ArrayList).

//=new ArrayList(); new shows that a new data structure of type ArrayList() is being created and it will be stored in the instance which is (array).

array.Add("laptop");

//Add is basically the built in function in c# which is associated with (ArrayList). Anything typed in the brackets of Add() function will be added in (ArrayList).

//get item

Console.Write(array[0].ToString());

//The above mentioned line will convert any item you want to add in ArrayList to String by ToString() method.

//remove item

array.Remove("laptop");

//Remove is basically the built in function in c# which is associated with (ArrayList). Anything typed in the brackets of Remove() function will be removed from (ArrayList).

//clear array

array.Add("laptop");

array.Add("TV");

array.Add("computer");

array.Clear();

//Clear is basically the built in function in c# which is associated with (ArrayList). Clear() clears the whole ArrayList.

}

Now in main() you will make the instance of your class and call the function

s in in the following way:

CollectionTest test=new CollectionTest();

test. testArrayList();

Another Scenario:

Int size;
String itemName;
ArrayList array=new ArrayList();

Public void ADDarrayItem()
{

     Console.WriteLine("Enter the Items you WANT to ADD:");
     Console.Read(size);

      for(int i=0; i<=size; i++)
      {
        Console.WriteLine("ENTER the name of item"i+1);
        Console.Read(itemName);
        array.Add(itemName);
      }
}

Public void REMOVEarrayItem()
{

  Console.WriteLine("ENTER the name of item you WANT to REMOVE:");

  Console.Read(itemName);

       for(int j=0; j<=Size;j++)
       {

          myArray.RemoveAt(IndexOf(itemName));

       }
}

Int size;

String itemName;

ArrayList array=new ArrayList();

Public void ADDarrayItem()

{

Console.WriteLine("Enter the Items you WANT to ADD:");

Console.Read(size);

for(int i=0; i<=size; i++)

{

Console.WriteLine("ENTER the name of item"i+1);

Console.Read(itemName);

array.Add(itemName);

}

Public void REMOVEarrayItem()

{

Console.WriteLine("ENTER the name of item you WANT to REMOVE:");

Console.Read(itemName);

for(int j=0; j<=Size;j++)

{

myArray.RemoveAt(IndexOf(itemName));

}

ArrayList Collection C#

ArrayList:

Another Scenario:

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