splitting a Line from a file and saving in multidim. array

Question

I would like to split the line from the csv file and save it into a multidimensional array but i am getting an error cannot convert type string into string[]. because i cannot say fields[][] = line.Split(|)

For example the line is:

1|2|3|4|5|6

1|6.9|GREATER THAN|%|29.844000|x|1

1|-27|LESS THAN|dBc|-30.51400|x|1

and i would like to subtract the third column from the second. Depending on the row number which is i in the following code. So i am using tryToparse as follows but the thing is that i want to access fields[i,2] and fields[i,1] and subtract or add them. but i cannot because i cannot use it in line.Split. How can i resolve this?. Thanks in advance

while ((line = reader.ReadLine()) != null)
            {
              //  bJump = false;
               // Console.WriteLine(line);
                string[] fields = line.Split('|');
// I want to say fields[][] = line.Split because i am //accessing fields[i,1] and [i,2] down in the code but i am //getting the error of cannot convert string to string[]
                int parsed_field1;
                int parsed_field2;


for (int i = 0; i < count-1; i++)
                {

                    bool wasParsedOK1 = Int32.TryParse(fields[i,1], out parsed_field1);
                    bool wasParsedOK2 = Int32.TryParse(fields[i,2], out parsed_field2);


                    Result[i, 0] = "PATS_TEST";
                    if (isheader)
                    {

                        isheader = false;                       //Data
                        Result[i, 1] = "Track ID";
                        Result[i, 2] = "DATUM";             //Datum from the header
                        Result[i, 3] = fields[i,1];             //Test Code
                        Result[i, 4] = "1";                     // Test Channel
                        Result[i, 5] = "Test Value";
                        Result[i, 6] = "1";                     //Test Frequency
                        Result[i, 7] = fields[i,5];             // Status
                        Result[i, 8] = "1";                     // Test Voltage


                        if (wasParsedOK1 && wasParsedOK2)
                        {
                            Result[i, 9] = (parsed_field1 - parsed_field2).ToString();                     // Lower Limit
                            Result[i, 10] = (parsed_field1 + parsed_field2).ToString();                   // Upper Limit

                        }
                        else if (!wasParsedOK2)
                        {
                        if (fields[2].Contains("GREATER THAN"))
                        {
                            Result[i, 9] = fields[i,1];
                            Result[i, 10] = (Int32.Parse(fields[1])+10).ToString();

                        }
                        else if (fields[i,2].Contains("LESS THAN"))
                        {
                            Result[i, 9] = fields[i,1];
                            Result[i, 10] = "0";

                        }