相关疑难解决方法(0)

我在下面ObservableCollection<string>.我需要进行排序按字母顺序这一点.

private ObservableCollection<string> _animals = new ObservableCollection<string>
{
    "Cat", "Dog", "Bear", "Lion", "Mouse",
    "Horse", "Rat", "Elephant", "Kangaroo", "Lizard", 
    "Snake", "Frog", "Fish", "Butterfly", "Human", 
    "Cow", "Bumble Bee"
};

我试过了_animals.OrderByDescending.但我不知道如何正确使用它.

_animals.OrderByDescending(a => a.<what_is_here_?>);

我怎样才能做到这一点？

我试过了:

Persons = from i in Persons orderby i.Age select i;

但我无法将Linqs转换System.Linq.IOrderedEnumerable为ObservableCollection<Person>.