Get the column names of a table and store them in a string or var c# asp.net

Question

I was wondering how I could get the columns of a database table and store each of them in a string or string array. I have the following code but I believe it does not work.

Answer 1

private void leavestat()
    {
        if (conn.State == ConnectionState.Closed)
        {
            conn.Open();
        }

        string query = "SELECT * FROM leaverecord";
        MySqlCommand cmd = new MySqlCommand(query, conn);
        MySqlDataAdapter da = new MySqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        da.Fill(dt);

        for (int i = 0; i < dt.Columns.Count; i++)
        {
             listBox1.Items.Add(dt.Columns[i].ToString());
        }
            conn.Close();
    }