Isolating a float value in a .csv file

Question

I stumbled upon a little coding problem. I would like to read a.csv file and handle its data as float numbers (for changing some parameters of an object), so I can use any single of the numbers of the.csv file separately. My code at this point can read the.csv file but I am unable to handle every number as float. How can I use isolate a value from a.csv to use it later in the program? The data file I use has 4 rows and 100 lines. My code at this point is this (it can only read the data from the.csv file):

    using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    using System.IO;
    
    public class mag_rotation : MonoBehaviour
    {
        // Start is called before the first frame update
        void Start()
        {
            ReadCSVFile();      
        }
    
        void ReadCSVFile()
        {
            StreamReader strReader = new StreamReader("D:200119200120.csv");
            bool endOfFile = false;
            while(!endOfFile)
            {
                string data_String = strReader.ReadLine();
                if (data_String == null)
                {
                    endOfFile = true;
                    break;
                }
                var data_values = data_String.Split (',');
            }
        }
        void Update()
        {
            
        }
    }

For example, from the data below:

0,17.02241,-4.793719,4.5759873,0
1,17.394623,-4.112285,3.5357802,0
2,17.713495,-2.6983683,3.3584955,0
3,17.106792,-5.2200847,4.727033,0
4,19.82562,3.1341507,3.834365,0
5,19.019388,1.9219573,5.6495733,0
6,18.546461,1.6253153,6.850214,0
7,17.545639,4.703565,7.0512614,0

I want to isolate the value in the second row, in the first line, 17.02241, and use it as a float later in the program.