קבועים

static void Main(string[] args)
{
  const double PI = 3.1416;
  const int N = 33;        // number of students in the class
  const int FREEZE = -4;   // freezing temp.

  double t;
  double avg, sum = 2835, area, r = 2 ;
  Console.WriteLine("insert temperature: ");
  t = double.Parse(Console.ReadLine());

  if(t==FREEZE)
  {
     avg = sum / N;
     Console.WriteLine("the avg of {0} students is: {1}",N,avg);
     area = PI * Math.Pow(r, 2);
  }
     Console.WriteLine("**Hammam**");
}

static void Main(string[] args)
{
  const double Ratio = 3.59;
  char ch;
  double money;

  Console.Write("insert amount of money: ");
  money = double.Parse(Console.ReadLine());
  Console.Write("insert s for shekel or d for dollars: ");
  ch = char.Parse(Console.ReadLine());

  if (ch == 's')
      Console.WriteLine("{0} Shekels = {1} Dollars", money, money / Ratio);
  else
      Console.WriteLine("{0} Dollars = {1} Shekels", money, money * Ratio);
}