C# Add List<string> to List<List<string>> array

Question

I'm able to add List<string> in List<List<string>> array in this way:

        List<string> first = new List<string> { "one", "two", "three" };
        List<string> second = new List<string> { "four", "five", "six" };

        List<List<string>> list_array = new List<List<string>> { first, second };

Now I need to create several lists populated with database records and then to add this lists to List<List<string>> array:

    List<List<string>> array_list;

            while (dr.Read())
            {
                string one = dr["Row1"].ToString();
                string two = dr["Row2"].ToString();

                List<string> temp_list = new List<string> { one, two };

                //Here I need to add temp_list to array_list
            }

Answer 1

Create an empty array_list:

List<List<string>> array_list = new List<List<string>>();

Then use Add method to add items:

array_list.Add(temp_list);