using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApp{    public class Ye    {        public string Y { get; set; }        public string E { get; set; }    }    public class Hao    {        public string H { get; set; }        public string A { get; set; }        public string O { get; set; }    }    class Program    {        static void Main(string[] args)        {            List
     
       yes = new List
      
       () {                new Ye() { E = "e1", Y = "y1" },                new Ye() { E = "e2", Y = "y2" },                new Ye() { E = "e3", Y = "y3" },            };            List
       
         haos = new List
        
         ()            {                new Hao(){ A="A1", H="H1", O="O1" },                new Hao(){ A="A2", H="H2", O="O2" },                new Hao(){ A="A3", H="H3", O="O3" }            };            //笛卡尔积            var data = from d in yes                       from t in haos                       select new { d, t };            //笛卡尔积            var data1 = from d in yes                       from t in haos                       select new                       {                           d.E,                           d.Y,                           t.A,                           t.H,                           t.O                       };            Console.Read();        }           }}