I have a list of array that contains multiple arrays. each array has 2 index .. First, I want to loop the list. Then i want to loop the array inside the list .. How can i do that ? I try to use this way, but it doesn't work !

1. foreach (string[] s in ArrangList1)

2. {

3. int freq1 = int.Parse(s[1]);

4. foreach (string[] s1 in ArrangList)

5. {

6. int freq2 = int.Parse(s1[1]);

7. if (freq1 < freq2)

8. {

9. backup = s;

10. index1 = ArrangList1.IndexOf(s);

11. index2 = ArrangList.IndexOf(s1);

12. ArrangList[index1] = s1;

13. ArrangList[index2] = s;

14. }

15. backup = null;

16. }

17. }

it give me error in line 4..

I try to do the loop using other way .. but i don't know how to continue !

for (int i = 0; i < ArrangList1.Count; i++)

       {

           for (int j = 0; j < ArrangList1[i].Length; j++)

           {

               ArrangList1[i][1];

           }

       }

I use C# language .. Can someone help me, please?