C# 俩个字符串数据进行对比取出不同的数据

string sel_JD = "电冰箱，电热水壶，客厅空调，饮水机，"; string Operation_JD = "电冰箱，电热水壶，电动汽车，"; List<string> select_operation = new List<string>(); string[] sel_arr = s