[Jumpstart C#] loops demo - is prime ?

using System;

class IsPrime
{
    static void Main()
    {
        Console.Write("Enter a positive integer number: ");
        uint number = UInt32.Parse(Console.ReadLine());
        uint divider = 2;
        uint maxDivider = (uint)Math.Sqrt(number);
        bool isPrime = true;

        while (isPrime && divider <= maxDivider)
        {
            if (number % divider == 0)
            {
                isPrime = false;
            }
            divider++;
        }

        Console.WriteLine("Is prime? - {0}", isPrime);
    }
}