using System;

public interface IName

{

    IAge WithName(string name);

}

​

public interface IAge

{

    IPersist WithAge(int age);

}

​

public interface IPersist

{

    void Save();

}

​

public class Person : IName, IAge, IPersist

{

​

    public string Name { get; private set; }

    public int Age { get; private set; }

​

    private Person()

    {       

    }

​

    public static IName Create()

    {

        return new Person();

    }

​

    public IAge WithName(string name)

    {

        Name = name;

        return this;

    }

​

    public IPersist WithAge(int age)

    {

        Age = age;

        return this;

    }

​

    public void Save()

    {

        // save changes here

        Console.WriteLine("Name is :"+Name);

        Console.WriteLine("Age is :"+Age);

        Console.WriteLine("Save Called");

    }

}

​

public class Program

{

    public static void Main(string[] args)

    {

        Person

            .Create()

            .WithName("Venkat")

            .WithAge(25)

            .Save();

    }

}