using System;
using System.IO;
 
namespace Recetas.Cap03
{
    internal class Aplicacion
    {
        public static void Main()
        {
            Console.WriteLine();
 
            // Create un nuevo objeto de `StringReader`:
            Object objeto = new StringReader("Blog xCSw");
 
            // Comprueba si `objeto` es de tipo StringReader:
            if (typeof (StringReader) == objeto.GetType())
            {
                Console.WriteLine("Uso operador typeof: `objeto` es de tipo `StringReader`.");
            }
 
            // Comparación con el operador is:
            // ¿`objeto` deriva de `TextReader`?:
            if (objeto is TextReader)
            {
                Console.WriteLine("Uso método GetType: `objecto` es de tipo `TextReader` o clase derivada.");
            }
 
            // Usamos GetType para comprobar si `objecto` es de tipo 
            // System.IO.TextReader:
            if (EsTipoDe(objeto, "System.IO.TextReader"))
            {
                Console.WriteLine("Uso operador is: `objecto` es de tipo `TextReader`");
            }
 
            // Uso de operador as:
            StringReader lector = objeto as StringReader;
            if ( lector != null)
            {
                Console.WriteLine("Uso operador as: `objecto` es de tipo `StringReader`");
            }
 
            Console.WriteLine();
        }
 
        ///<summary>
        /// Comprueba si un objeto ese instancia de un tipo.
        ///</summary>
        ///<param value="obj">Instancia de un objeto.</param>
        ///<param value="tipo">Nombre del tipo</param>
        public static bool EsTipoDe(object obj, string tipo)
        {
            Type t = Type.GetType(tipo, true, true);
 
            return t == obj.GetType() || obj.GetType().IsSubclassOf(t);
        }
    }
}

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