Check Division In Range Of Numbers

/*
 * Write a program that reads two positive integer numbers and prints how many numbers p exist between them such that the reminder of the division by 5 is 0 (inclusive). Example: p(17,25) = 2.
 */

using System;

class CheckDivisionInRangeOfNumbers
{
    static void Main()
    {
        int i;
        int counter = 0;
        uint number1, number2, newNumber1, newNumber2, range;

        Console.WriteLine("Define range of positive numbers:");
        do
        {
            Console.WriteLine("start: ");
        }while(!(uint.TryParse(Console.ReadLine(),out number1) && number1 <=uint.MaxValue));
        do
        {
            Console.WriteLine("end: ");
        } while (!(uint.TryParse(Console.ReadLine(), out number2) && number2 <= uint.MaxValue));

        if ((number1 < number2)==false || (number1 == number2)==true)
        {
            newNumber1 = number2;
            newNumber2 = number1;
        }
        else
        {
            newNumber1 = number1;
            newNumber2 = number2;
        }

        range = newNumber2 - newNumber1;
        Console.WriteLine();
        for ( i = 0; i <= range; i++ )
        {
            if (newNumber1 % 5 == 0)
            {
                //Console.Write(newNumber1 +"; ");
                counter++;
            }

            newNumber1++;
        }
        //Console.WriteLine("\n");
        if (counter == 1)
        {
            Console.WriteLine("There is {0} number between {1} and {2} and its division by 5 is 0\r\n", counter, number1, number2);
        }
        else
        {
            Console.WriteLine("There are {0} numbers between {1} and {2} and their division by 5 is 0\r\n", counter, number1, number2);
        }

            Main();
    }
}