Loaded CSV file into 2D array then display via listbox (C#)

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C#

The end goal is to load a csv file into a two-dimensional array then display those data into the listbox I created. The code below should load the csv file but I dont know how I can now get the 2D array I created into the listbox.

What I have tried:

string filePath = "data.txt"; // CSV File
int count = 0;
string[,] list = new string[6, 4];


private void App_Load(object sender, EventArgs e)
{

        FileStream fstrm = new FileStream(path, FileMode.Open,          FileAccess.Read);
        StreamReader sread = new StreamReader(fstrm);

        while (!sread.EndOfStream)
        {
            string line = sr.ReadLine();
            string[] parts = line.Split(',');

            for (int i = 0; i < parts.Length; i++)
            {
                list[count, i] = parts[i];
            }
            count++;


        }