You can use the AddRange method of the ArrayList object to add the range of elements (string array) to ArrayList in C#.
How to Add range of elements to ArrayList in C# ?
Here’s the code that demonstrates how to do it.
using System;
using System.Collections;
namespace ACConsoleApp1
{
class Program
{
static void Main(string[] args)
{
ArrayList movies = new ArrayList();
movies.Add("Robo 2.0");
movies.Add("Kabali");
string[] OtherMovies = new string[2];
OtherMovies[0] = "Ghilli";
OtherMovies[1] = "Billa 2";
// Add the string array to ArrayList
movies.AddRange(OtherMovies);
foreach (var item in movies)
Console.WriteLine(item);
Console.ReadLine();
}
}
}