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// ===++===
//
//    OrtizOL
//
// ===--===
/*============================================================
//
// Clase: ClaseGenerica.cs
//
// Propósito: Uso de restricción de parámetros de tipo.
//
============================================================*/
 
using System;
 
namespace Articulos.Cap03
{
    internal class A { }
 
    internal class B : A { }
 
    internal class C : B { }
 
    internal class D : Object { }
 
    internal class ClaseGenerica<T> where T:A
    {
        // Cuerpo de implementación
    }
 
    internal class PruebaClaseGenerica
    {
        public static void Main()
        {
            ClaseGenerica<A> a = new ClaseGenerica<A>();
            ClaseGenerica<B> b = new ClaseGenerica<B>();
            ClaseGenerica<C> c = new ClaseGenerica<C>();
 
            ClaseGenerica<D> d = new ClaseGenerica<D>();
        }
    }
}

prog.cs(39,13): error CS0311: The type `Articulos.Cap03.D' cannot be used as type parameter `T' in the generic type or method `Articulos.Cap03.ClaseGenerica<T>'. There is no implicit reference conversion from `Articulos.Cap03.D' to `Articulos.Cap03.A'
prog.cs(26,20): (Location of the symbol related to previous error)
prog.cs(39,38): error CS0311: The type `Articulos.Cap03.D' cannot be used as type parameter `T' in the generic type or method `Articulos.Cap03.ClaseGenerica<T>'. There is no implicit reference conversion from `Articulos.Cap03.D' to `Articulos.Cap03.A'
prog.cs(26,20): (Location of the symbol related to previous error)
Compilation failed: 2 error(s), 0 warnings

Standard output is empty