String vs string.

DiferenciaStringYstring.cs

namespace Articulos.Preguntas.P0302
{
    public sealed class DiferenciaStringYstring
    {
        public static void Main()
        {
            Console.WriteLine (typeof(String));
            Console.WriteLine (typeof(string));
            
            String blog1 = "Blog xCSw";
            string blog2 = "Blog xCSw";
            
            Console.WriteLine (blog1);
            Console.WriteLine (blog2);
            
            Console.WriteLine (String.Concat(blog1, blog2));
            Console.WriteLine (string.Concat(blog1, blog2));
        }
    }
}