using System;

public class Program

{

    public static void Main()

    {

        Seed1.Create();

        Seed2.Create();

​

    }

}

​

​

public static class Seed1

{       

    private static int _prefix = 500;

    public static void Create() 

    {

        Console.WriteLine($"Starting Seed From {nameof(Seed1)}");

        for(int i = 0; i <  10; i++)

        {

            var key = KeyGenerator.Key(_prefix,i+1);

            Console.WriteLine("key: " + key);

        }

    }

}

​

public static class Seed2

{       

    private static int _prefix = 200;

    public static void Create() 

    {

        Console.WriteLine($"Starting Seed From {nameof(Seed2)}");

        for(int i = 0; i <  20; i++)

        {

            var key = KeyGenerator.Key(_prefix,i+1);

            Console.WriteLine("key: " + key);

        }

    }

}

​

public static class KeyGenerator

{   

    public static int Key(int prefix, int _initValue)

    {

        return int.Parse((prefix+(_initValue).ToString("D3")).ToString());

    }

}