Data Types C#

using System;
using System.Numerics;
public class Example
{
   public static void Main()
   {
      Complex number1 = new Complex(8.311, 17.115);
      Complex[] numbers = { new Complex(1.4, 6.3), 
                            new Complex(3.1, -2.1) };
      foreach (Complex number2 in numbers)
         Console.WriteLine("{0} x {1} = {2}", number1, number2, 
                           Complex.Multiply(number1, number2));
   }
}