public static void Main()
 {
     Contact c1 = new Contact("Marie Ortiz", "773-508-7890",
                           "*****@*****.**");
      Contact c2 = new Contact("Otto Heinz", "773-508-9999",
                           "*****@*****.**");
      Console.WriteLine("Marie's full name: " + c1.GetName());
      Console.WriteLine("Her phone number: " + c1.GetPhone());
      Console.WriteLine("Her email: " + c1.GetEmail());
      Console.WriteLine("\nFull contact info for Otto:");
      c2.Print();
 }
 // main chunk
 public static void Main()
 {
     Contact c1 = new Contact("Marie Ortiz", "773-508-7890",
                           "*****@*****.**");
      Contact c2 = new Contact("Otto Heinz", "773-508-9999",
                           "*****@*****.**");
      Console.WriteLine("Marie's full name: " + c1.GetName());
      Console.WriteLine("Her phone number: " + c1.GetPhone());
      Console.WriteLine("Her email: " + c1.GetEmail());
      Console.WriteLine("All together:\n{0}", c1);
      Console.WriteLine("Full contact info for Otto:");
      c2.Print();
      c1.SetEmail("*****@*****.**");
      c2.SetPhone("123-456-7890");
      Contact c3 = new Contact("Amy Li", "847-111-2222",
                           "*****@*****.**");
      Console.WriteLine("With changes and added contact:");
      var allc = new List<Contact>(new Contact[] {c1, c2, c3});
      foreach(Contact c in allc) {
     Console.WriteLine("\n"+c);
      }
 }