// File Program.cs 

using System;

​

public class Program

{

    public static void Main()

    {

        Composer comp = new Composer();

        comp.InitializeComp();

        comp.Composer2();

        comp.Composer3();

        comp.Composer4();

    }

}

// File file01.cs

public partial class Composer

{

    public partial void InitializeComp();

    public void Composer2() {

        Console.WriteLine("Two");

    }

    public void Composer3() {

        Console.WriteLine("Three");

    }

}

// File file02.cs

public partial class Composer

{

    public void Composer4() 

    {

        Console.WriteLine("Four");

    }

    public partial void InitializeComp()

    {

        string name = "Mozart";

        Console.WriteLine(name);

    }

}