小编Sum*_*Guy的帖子

我想将groupedList传递给几个函数，但是当尝试使用类而不是匿名类型进行分组时，却得到了奇怪的结果。在下面的示例中，匿名类型按预期返回2个结果，但是具体类返回5，就好像没有分组一样。

问题：是否可以使用具体的类对Linq进行Sql Group By？

public class person
{
    public string Name;
    public string State;
}

public class personGroup
{
    public string State;
    public personGroup(string personState)
    {
        State = personState;
    }
}


void Main()
{   
    var people = new List<person>();
    people.Add(new person {Name = "Bob", State = "Tx"});
    people.Add(new person {Name = "Bill", State = "Tx"});
    people.Add(new person {Name = "Tracy", State = "Tx"});
    people.Add(new person {Name = "Steve", State = "Md"});
    people.Add(new person {Name = "Kelly", State = "Md"});

    var …