C# | Remove all elements from the ArrayList (original) (raw)

Last Updated : 01 Feb, 2019

ArrayList represents an ordered collection of an object that can be indexed individually. It is basically an alternative to an array. It also allows dynamic memory allocation, adding, searching and sorting items in the list. ArrayList.Clear method is used to remove all the elements from the ArrayList.Properties:

Syntax:

public virtual void Clear ();

Exceptions: This method will give NotSupportedException if the ArrayList is read-only or the ArrayList has a fixed size. Note:

Below programs illustrate the use of ArrayList.Clear Method:Example 1 :

CSHARP `

// C# code to remove all elements // from an ArrayList using System; using System.Collections;

class GFG {

// Driver code
public static void Main()
{

    // Creating an ArrayList
    ArrayList myList = new ArrayList(10);

    // Adding elements to ArrayList
    myList.Add("A");
    myList.Add("B");
    myList.Add("C");
    myList.Add("D");
    myList.Add("E");
    myList.Add("F");

    // Displaying the elements in ArrayList
    Console.WriteLine("Number of elements in ArrayList initially : " 
                                                    + myList.Count);

    // Removing all elements from ArrayList
    myList.Clear();

    // Displaying the elements in ArrayList
    // after Removing all the elements
    Console.WriteLine("Number of elements in ArrayList : " + myList.Count);
}

}

`

Output:

Number of elements in ArrayList initially : 6 Number of elements in ArrayList : 0

Example 2:

CSHARP `

// C# code to remove all elements // from an ArrayList using System; using System.Collections;

class GFG {

// Driver code
public static void Main()
{

    // Creating an ArrayList
    ArrayList myList = new ArrayList(10);

    // Adding elements to ArrayList
    myList.Add(3);
    myList.Add(5);
    myList.Add(7);
    myList.Add(9);
    myList.Add(11);

    // Displaying the elements in ArrayList
    Console.WriteLine("Number of elements in ArrayList initially : " 
                                                    + myList.Count);

    // Removing all elements from ArrayList
    myList.Clear();

    // Displaying the elements in ArrayList
    // after Removing all the elements
    Console.WriteLine("Number of elements in ArrayList : " + myList.Count);
}

}

`

Output:

Number of elements in ArrayList initially : 5 Number of elements in ArrayList : 0

Reference:

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