C# | Adding elements to the end of the ArrayList (original) (raw)

Last Updated : 01 Feb, 2019

AddRange(ICollection) Method is used to add the elements of an ICollection to the end of the ArrayList. Or in other words, this method is used to add the multiple elements from other collection into an ArrayList. Here elements are defined as the primitive or non-primitive type. Syntax:

public virtual void AddRange (ICollection col);

Here, col is an ICollection whose elements should be added to the end of the ArrayList. The collection itself cannot be null, but it can contain null elements.Exception:

Below given are some examples to understand the implementation in a better way: Example 1:

CSharp `

// C# program to illustrate the AddRange() Method using System; using System.Collections;

class GFG {

// Main method
public static void Main()
{

    // Creates and initializes a new ArrayList
    ArrayList mylist = new ArrayList();
    mylist.Add("C# ");
    mylist.Add("DSA ");
    mylist.Add("Java ");
    mylist.Add("CPP");

    // Creates and initializes a new Queue
    Queue mydata = new Queue();
    mydata.Enqueue("C ");
    mydata.Enqueue("Python ");
    mydata.Enqueue("HTML ");
    mydata.Enqueue("CSS ");
    mydata.Enqueue("JavaScript ");
    mydata.Enqueue("Ruby");

    // Displays the ArrayList and the Queue.
    Console.Write("The original ArrayList: ");
    Data(mylist);
    
    Console.Write("The original Queue: ");
    Data(mydata);

    // Copies the elements of the queue to the end of the ArrayList.
    mylist.AddRange(mydata);

    // Displays the new ArrayList.
    Console.Write("The new ArrayList is: ");
    Data(mylist);
}

// method to display the ArrayList
// and Queue elements
public static void Data(IEnumerable mylis)
{
    foreach(string str in mylis)
        Console.Write("{0}", str);
    Console.WriteLine();
}

}

`

Output:

The original ArrayList: C# DSA Java CPP The original Queue: C Python HTML CSS JavaScript Ruby The new ArrayList is: C# DSA Java CPPC Python HTML CSS JavaScript Ruby

Example 2:

CSharp `

// C# program to illustrate // the AddRange() Method using System; using System.Collections;

public class GFG {

// Main method
public static void Main()
{

    // Creates and initializes a new ArrayList.
    ArrayList mylist = new ArrayList();
    mylist.Add(5);
    mylist.Add(10);
    mylist.Add(15);
    mylist.Add(20);
    mylist.Add(25);

    // Creates and initializes a new ArrayList.
    ArrayList mydata = new ArrayList();
    mydata.Add(30);
    mydata.Add(35);
    mydata.Add(40);
    mydata.Add(45);
    mydata.Add(50);

    // Displays both ArrayList.
    Console.WriteLine("The ArrayList 1: ");
    foreach(int i in mylist)
    {
        Console.WriteLine(i);
    }
    Console.WriteLine("The ArrayList 2: ");
    foreach(int j in mydata)
    {
        Console.WriteLine(j);
    }

    // Copies the elements of the mydata
    // to the end of the mylist
    mylist.AddRange(mydata);

    // Displays the new ArrayList.
    Console.WriteLine("The new ArrayList is :");
    for (int k = 0; k < mylist.Count; k++)
        Console.WriteLine(mylist[k]);
}

}

`

Output:

The ArrayList 1: 5 10 15 20 25 The ArrayList 2: 30 35 40 45 50 The new ArrayList is : 5 10 15 20 25 30 35 40 45 50

Reference: