C# | Adding the elements to the end of the ArrayList
ArrayList.AddRange(ICollection) Method is used to add the elements of an ICollection to the end of the ArrayList.
Syntax:
public virtual void AddRange (System.Collections.ICollection c);
Here, c is the ICollection whose elements should be added to the end of the ArrayList. The collection itself cannot be null, but it can contain elements that are null.
Exceptions:
- ArgumentException: If c is null
- NotSupportedException: If the ArrayList is read-only or ArrayList has a fixed size.
Below programs illustrate the use of the above-discussed method:
Example 1:
// C# code to add the elements of an// ICollection to the end of the ArrayListusing System;using System.Collections; class GFG { // Driver code public static void Main() { // Creating an ArrayList ArrayList myList = new ArrayList(); // Adding elements to ArrayList myList.Add("A"); myList.Add("B"); myList.Add("C"); myList.Add("D"); myList.Add("E"); myList.Add("F"); Console.WriteLine("Before AddRange Method"); Console.WriteLine(); // displaying the item of myList foreach(String str in myList) { Console.WriteLine(str); } Console.WriteLine("\nAfter AddRange Method\n"); // Here we are using AddRange method // Which adds the elements of myList // Collection in myList again i.e. // we have copied the whole myList // in it myList.AddRange(myList); // displaying the item of List foreach(String str in myList) { Console.WriteLine(str); } }} |
Output:
Before AddRange Method A B C D E F After AddRange Method A B C D E F A B C D E F
Example 2:
// C# code to add the elements of an// ICollection to the end of the ArrayListusing System;using System.Collections; class GFG { // Driver code public static void Main() { // Creating an ArrayList ArrayList myList = new ArrayList(); // adding elements in myList myList.Add("Geeks"); myList.Add("GFG"); myList.Add("C#"); myList.Add("Tutorials"); Console.WriteLine("Before AddRange Method"); Console.WriteLine(); // displaying the item of myList foreach(String str in myList) { Console.WriteLine(str); } Console.WriteLine("\nAfter AddRange Method\n"); // taking array of String string[] str_add = { "Collections", "Generic", "List" }; // here we are adding the elements // of the str_add to the end of // the myList myList.AddRange(str_add); // displaying the item of List foreach(String str in myList) { Console.WriteLine(str); } }} |
Output:
Before AddRange Method Geeks GFG C# Tutorials After AddRange Method Geeks GFG C# Tutorials Collections Generic List
Note:
- ArrayList accepts null as a valid value and allows duplicate elements.
- The order of the elements in the ICollection is preserved in the ArrayList.
Reference:
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