Third Digit Check

using System;

class ThirdDigitCheck
{
    static void Main()
    {
        int number, divisionBy100, checkForDidit7, digitsCount;

        Console.WriteLine("Enter number with minimum 3 digits:");

        if (int.TryParse(Console.ReadLine(), out number) && number >= int.MinValue && number <= int.MaxValue)
        {
            if (number < 0 && number.ToString().Length >= 4)
            {
                divisionBy100 = (number / 100);
                checkForDidit7 = divisionBy100 % 10;
                Console.WriteLine();
                Console.WriteLine(checkForDidit7 == 7 ? "The third digit of your number {0} is 7" : "The third digit of your number {0} is not 7, it's {1}", number, checkForDidit7);
                Main();
            }
            else if (number > 0 && number.ToString().Length >= 3)
            {
                divisionBy100 = (number / 100);
                checkForDidit7 = divisionBy100 % 10;
                Console.WriteLine(checkForDidit7 == 7 ? "The third digit of your number {0} is 7\n" : "The third digit of your number {0} is not 7, it's {1}\n", number, checkForDidit7);
                Main();
            }
            else
            {
                if(number < 0)
                {
                    digitsCount = number.ToString().Length-1;
                }
                else
                {
                    digitsCount = number.ToString().Length;
                }

                Console.WriteLine(digitsCount == 1 ? "Your number contains only {0} digit!\n" : "Your number contains only {0} digits!\n", digitsCount);
                Main();
            }

        }
        else
        {
            Console.WriteLine("Invalid input!\n");
            Main();
        }

    }
}