Billpeng Space

摘要：var user = db.UserInfos.FirstOrDefault(a => a.Id == 5); //会在sql代码中生成Street = "上海"代码 var address1 = db.Entry(user).Collection(b => b.Address).Query().Where(p => p.Street == "上海" ).ToList(); //会把所有的Street的代码都取回内存，然后在内存在再访问 var... 阅读全文

摘要：using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyTest{ class Program { static void Main(string[] args) { MyClass first = new MyClass(); first.value = "原值"; MyClass second = ... 阅读全文