C# Fine Prime Number

[Rudeboyduke]

using System;

class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter a number:");
int number = int.Parse(Console.ReadLine());

    if (IsPrime(number))
    {
        Console.WriteLine($"{number} is a prime number.");
    }
    else
    {
        Console.WriteLine($"{number} is not a prime number.");
    }
}

static bool IsPrime(int number)
{
    if (number < 2)
    {
        return false;
    }

    for (int i = 2; i <= Math.Sqrt(number); i++)
    {
        if (number % i == 0)
        {
            return false;
        }
    }

    return true;
}

}