static void Main(string[] args) { var proxy = new ContactClient(); var c = proxy.GetByContactId(1); if (c != null) Console.WriteLine("{0} -> {1}", c.ContactID, c.FirstName); c = proxy.GetByContactId(10); if (c != null) Console.WriteLine("{0} -> {1}", c.ContactID, c.FirstName); c = proxy.GetByContactId(100); if (c != null) Console.WriteLine("{0} -> {1}", c.ContactID, c.FirstName); c = proxy.GetByContactId(1000); if (c != null) Console.WriteLine("{0} -> {1}", c.ContactID, c.FirstName); c = proxy.GetByContactId(10000); if (c != null) Console.WriteLine("{0} -> {1}", c.ContactID, c.FirstName); Console.WriteLine(); var contatos = proxy.GetFirst10(); foreach (var item in contatos) { Console.WriteLine(item.FirstName); } Console.ReadKey(); }