Hourglass

using System;
class Hourglass
{
  static void Main()
  {
    //Telerik Academy
    //Once upon a time a powerful wizard was born. His name was Gwenogfryn and soon he became a great sorcerer. Kind-hearted he was. He would only use his magic to protect humans from the evil witches that would come at night. Gwenogfryn, however was a pacifist and did not want to fight or hurt the witches, so he came up with another solution. He would catch the witches and throw them into a sand-glass (the only prison a witch cannot escape from). Unfortunately, he is running out of sand-glasses. Help Gwenogfryn catch all witches by making your own sand-glasses.
    //You have an integer number N (always odd number) showing the height of the sand clock.

    byte number = byte.Parse(Console.ReadLine());

    byte dots, stars;

    dots = 0;
    stars = number;
    bool flag = false;

    for (int row = 1; row <= number; row++)
    {
      for (int column = 1; column <= dots / 2; column++)
      {
        Console.Write(".");
      }
      for (int column = 1; column <= stars; column++)
      {
        Console.Write("*");
      }
      for (int column = 1; column <= dots/2; column++)
      {
        Console.Write(".");
      }
      Console.WriteLine();

      //Check if it is time to reverse the triangle to make it look like an hourglass.
      if (stars == 1)
      {
        flag = true;
      }
      if (flag == true)
      {
        stars += 2;
        dots -= 2;
      }
      else
      {
        stars -= 2;
        dots += 2;
      }
    }
  }
}