C# - Split an existing indexed array : Im Attempting to read a .txt file that is seperated by commas and two lines, currently i have it setup so that it reads the txt file but having trouble with it .split the existing array into two alternative ones based of the taxArray

 string[] taxArray = new string[2];
            int count = 0;

            try
            {
                if(File.Exists(filePath))
                {
                    //read the lines from text file add each line to its own array index.
                    foreach (string line in File.ReadLines(filePath, Encoding.UTF8))
                    {
                        taxArray[count] = line;
                        txtDisplay.Text += taxArray[count] + "\r\n";
                        count++;
                    }
                }
                else
                {
                    MessageBox.Show("This file cannot be found");
                }
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

This currently outputs exactly as i need.