thisUsoEnEstructura.cs

using System;

namespace Articulos.Preguntas
{
    public struct UsoThisEnEstructura
    {
        private int campo;

        public UsoThisEnEstructura(int valor)
        {
            this.campo = valor;
        }

        public void Metodo(int a)
        {
            this.campo = a;

            Console.WriteLine(campo.ToString());

            this = new UsoThisEnEstructura(9);

            Console.WriteLine(campo.ToString());
        }

        public static void Main()
        {
            UsoThisEnEstructura ut = new UsoThisEnEstructura(3);

            ut.Metodo(4);
        }
    }
}