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Remove all elements from the ArrayList in C#
To remove all elements from ArrayList, the code is as follows −
Example
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args){
ArrayList list1 = new ArrayList();
list1.Add("A");
list1.Add("B");
list1.Add("C");
list1.Add("D");
list1.Add("E");
list1.Add("F");
list1.Add("G");
list1.Add("H");
list1.Add("I");
Console.WriteLine("Elements in ArrayList1...");
foreach (string res in list1){
Console.WriteLine(res);
}
ArrayList list2 = new ArrayList();
list2.Add("A");
list2.Add("B");
list2.Add("C");
list2.Add("D");
list2.Add("E");
list2.Add("F");
list2.Add("G");
list2.Add("H");
list2.Add("I");
Console.WriteLine("Elements in ArrayList2...");
foreach (string res in list2){
Console.WriteLine(res);
}
ArrayList list3 = new ArrayList();
list3 = list2;
Console.WriteLine("Is ArrayList3 equal to ArrayList2? = "+list3.Equals(list2));
Console.WriteLine("Count of elements in ArrayList2 = " + list2.Count);
list2.Clear();
Console.WriteLine("Count of elements in ArrayList2 (Updated) = " + list2.Count);
}
}Output
This will produce the following output −
Elements in ArrayList1... A B C D E F G H I Elements in ArrayList2... A B C D E F G H I Is ArrayList3 equal to ArrayList2? = True Count of elements in ArrayList2 = 9 Count of elements in ArrayList2 (Updated) = 0
Example
Let us see another example −
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args){
ArrayList arrList = new ArrayList();
arrList.Add("One");
arrList.Add("Two");
arrList.Add("Three");
arrList.Add("Four");
arrList.Add("Five");
Console.WriteLine("Elements in ArrayList...");
foreach (string res in arrList){
Console.WriteLine(res);
}
Console.WriteLine("Count of elements in ArrayList = " + arrList.Count);
arrList.Clear();
Console.WriteLine("Count of elements in ArrayList (Updated) = " + arrList.Count);
}
}Output
This will produce the following output −
Elements in ArrayList... One Two Three Four Five Count of elements in ArrayList = 5 Count of elements in ArrayList (Updated) = 0
Updated on: 05-Dec-2019
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