using System;

public class Program

{

    public static void Main()

    {

          //Constructors....

            var man = new Man("John", "Doe");

            Console.WriteLine("{0} {1}", man.FirstName, man.LastName);

​

            man.Update("Jane", "Doe");

            Console.WriteLine("{0} {1}", man.FirstName, man.LastName);

​

            man.Update(lastName: "Smith", firstName: "Bob");

            Console.WriteLine("{0} {1}", man.FirstName, man.LastName);

​

            man.Update("Mark");

            Console.WriteLine("{0} {1}", man.FirstName, man.LastName);

​

            Console.Read();

    }

     public class Man

        {

            private string _firstName;

            private string _lastName;

            public Man(string firstName, string lastName)

            {

                Update(firstName, lastName);

            }

​

            public void Update(string firstName, string lastName = "Jones")

            {

                this.FirstName = firstName;

                this.LastName = lastName;

            }

​

            public string FirstName

            {

                get { return _firstName; }

                set { _firstName = value; }

            }

            public string LastName

            {

                get { return _lastName; }

                set { _lastName = value; }

            }

​

        }

}