C#: Count the number of strings of specified length in a given array of strings

using System; // Importing the System namespace for basic functionality
using System.Collections; // Importing collections for non-generic interfaces
using System.Collections.Generic; // Importing collections for generic interfaces
using System.Linq; // Importing LINQ for querying collections
using System.Text; // Importing classes for handling strings
using System.Threading.Tasks; // Importing classes for handling asynchronous tasks

namespace exercises // Defining a namespace called 'exercises'
{
    class Program // Defining a class named 'Program'
    {
        static void Main(string[] args) // The entry point of the program
        { 
            // Prompting the user for input
            Console.WriteLine("Number of Strings:");

            // Calling the 'test' method with an array of strings and a specified length
            Console.WriteLine(test(new[] {"a", "b", "bb", "c", "ccc" }, 1)); 
        }                  

        // Method to count the number of strings with a specific length in the array
        static int test(string[] arr_str, int len)
        {
            int ctr = 0; // Counter to track the number of strings with the specified length

            // Looping through each string in the array
            for (int i = 0; i < arr_str.Length; i++)
            {
                // Checking if the length of the current string matches the specified length
                if (arr_str[i].Length == len)
                {
                    ctr++; // Incrementing the counter if the length matches
                }
            }
            return ctr; // Returning the total count of strings with the specified length
        }    
    } 
}