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public class User
{
public int id { get; set; }
public virtual string name { get; set; }
public virtual string buyer { get; set; }
public virtual string idArr { get; set; }
}
static void Main(string[] args)
{
var q = new List<User>(){
new User(){id=1,name="haha"},
new User(){id=2,name="111"},
};
q[1].name = "hello my friend";
q.ForEach(x => Console.WriteLine(x.name));
Console.ReadLine();
}