C# Factorial

C# program to calculate factorial of n.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

// ? 2017 TheFlyingKeyboard and released under MIT License
// theflyingkeyboard.net

namespace Factorial
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = 0;

            Console.Write("Enter number: ");
            n = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Factorial of {0} is equal to {1}", n, factorial(n));

            Console.ReadKey();
        }

        public static int factorial(int n)
        {
            int fact = 1;

            for (int i = 2; i <= n; i++)
            {
                fact *= i;
            }

            return fact;
        }
    }
}