C#匿名实现IComparer接口-按指定字符串规则排序

需要将数组["丁","乙","甲","丙"]，按甲、乙、丙、丁排序，但是C#的字符串排序规则没有该排序类型，所以预指定顺序，再匿名生成IComparer接口的实现类。

var classOrderList = new List<string>{"甲","乙","丙","丁"};
var comparer = Comparer<string>.Create((k1, k2) => classOrderList.IndexOf(k1) - classOrderList.IndexOf(k2));