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//Funcion que carga imagen del directorio de imagenes
//Enrique La Cruz Umbrella
public ActionResult showimage(string id)
{
    var path = Server.MapPath("~/Content/icons");
    var file = String.Format("{0}.png", id);
    var fullPath = Path.Combine(path, file);
    return File(fullPath, "image/png", file);
} 
//In view
<img style="float:right; margin-top:15px" src="<%: @Url.Action("showimage", "home", new { id = usuario.ACC_IMAGEN })  %>" alt=""/>