using System;

using System.Reflection;

​

[System.AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = true)]

public class GrandpaAttribute : Attribute

{

    public GrandpaAttribute(string texto) 

    {

        First = texto;

    }

    public string First {get;set;} 

}

​

public class ParentAttribute : GrandpaAttribute

{

    public string Name { get; private set; }

​

    public ParentAttribute(string texto, string name) : base(texto)

    {

        Name = name;

    }

}

​

public class ChildAttribute : ParentAttribute

{

    public int Number { get; private set; }

​

    public ChildAttribute(string texto, string name, int number) 

        : base(texto, name)

    {

        Number = number;

    }

}

public class Foo

{

    [Child("The Beast",@"\m/", 666)]

    public string Description { get; set; }

    public DateTime SomeDate { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        string[] one = new string[] { "XXXXX-X-XXX", "YYYYY-Y-YYY" };

        string[] two = new string[] { "1", "2", "3", "4", "5" };

        string[] three;

        three = new string[one.Length * two.Length];

        int idx = 0;

​

        for (int i = 0; i < one.Length; i++)

        {

            for (int j = 0; j < two.Length; j++)

            {

                three[idx] = one[i] + "-" + two[j];

                idx++;

            }

        }

        foreach(var i in three)

        {

            Console.WriteLine(i);

        }

    }

}