using System;

using System.Reflection;

​

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

public class GrandpaAttribute : Attribute

{

    public GrandpaAttribute() 

    {

        First = "Teste";

    }

    public string First {get;set;} 

}

​

public class ParentAttribute : GrandpaAttribute

{

    public string Name { get; private set; }

​

    public ParentAttribute(string name)

    {

        Name = name;

    }

}

​

public class ChildAttribute : ParentAttribute

{

    public int Number { get; private set; }

​

    public ChildAttribute(string name, int number) 

        : base(name)

    {

        Number = number;

    }

}

public class Foo

{

    [Child("The Beast", 666)]

    public string Description { get; set; }

    public DateTime SomeDate { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        ChildAttribute childAttribute = typeof(Foo)

                .GetProperty("Description")

                .GetCustomAttribute<ChildAttribute>(true);      

        Console.WriteLine(((GrandpaAttribute)childAttribute).First);

    }

}