13 Trailing zeros

using System;

class TrailingZeros
{
    static uint CountZero(uint number)
    {
        uint zeroCount = 0;
        if (number % 5 == 0)
        {
            zeroCount++;
            zeroCount += CountZero(number / 5);
        }
        return zeroCount;
    }
    static void Main()
    {
        Console.Write("Input positive integer number N ");
        uint n = uint.Parse(Console.ReadLine());
        uint zeroCount = 0;
        for (uint i = 1; i <= n; i++)
        {
            zeroCount += CountZero(i);
        }
        Console.WriteLine("There are {0} trailing zeros in {1}!", zeroCount, n);
    }
}