c# – 循环收集

class A
{
    public string something { get; set; }
    public IList<B> b= new List<B>();
}

class B
{
    public string else { get; set; }
    public string elseelse { get; set; }
}

我已经填充了一个名为obj的A类对象.如何遍历此对象并打印值.我是否必须使用两个foreach,就像这里的一个节目,还是有更好的方法？

foreach (var z  in obj)
            {
                // print z.something;
                foreach (var x in z.b)
                {
                    // print x.elseelse;
                }
            }

var qry = from z in obj
          from x in z.b
          select new { z, x };
foreach (var pair in qry)
{
     Console.WriteLine("{0}, {1}", pair.z.something, pair.x.elseelse);
}

要么

var qry = from z in obj
          from x in z.b
          select new { z.zomething, x.elseelse };
foreach (var item in qry)
{
     Console.WriteLine("{0}, {1}", item.something, item.elseelse);
}

或投射字符串：

var qry = from z in obj
          from x in z.b
          select z.zomething + ", " + x.elseelse;
foreach (string s in qry)
{
     Console.WriteLine(s);
}