C#: Check whether a given number is within 2 of a multiple of 10

using System;
using System.Linq;

namespace exercises
{
    // Class declaration
    class Program
    {
        // Main method - entry point of the program
        static void Main(string[] args)
        {
            // Calling the 'test' method with different integers and printing the results
            Console.WriteLine(test(3));   // Output: True
            Console.WriteLine(test(7));   // Output: True
            Console.WriteLine(test(8));   // Output: True
            Console.WriteLine(test(21));  // Output: False
            Console.ReadLine(); // Keeping the console window open
        }

        // Method to check if the last digit of a number is less than or equal to 2 or greater than or equal to 8
        public static bool test(int n)
        {
            // Returns true if the last digit of 'n' is less than or equal to 2 OR greater than or equal to 8
            return n % 10 <= 2 || n % 10 >= 8;
        }
    }
}