Не преобразовывается string в double и не вносится в массив - C#

            double[] myArray = new double[5];
            myArray[0] = Convert.ToDouble(procent);
            myArray[1] = Convert.ToDouble(procent1);
            myArray[2] = Convert.ToDouble(procent2);
            myArray[3] = Convert.ToDouble(procent3);
            myArray[4] = Convert.ToDouble(procent4);

            double[] myArray = new double[5];
            myArray[0] = double.Parse(procent);
            myArray[1] = double.Parse(procent1);
            myArray[2] = double.Parse(procent2);
            myArray[3] = double.Parse(procent3);
            myArray[4] = double.Parse(procent4);

using System;
using System.Collections;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
 
namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        public void button1_Click(object sender, EventArgs e)
        {
            WebClient client = new WebClient();
            string adress = "http://economictimes.indiatimes.com/indian-oil-corporation-ltd/stocks/companyid-11924.cms";
            string newLine = client.DownloadString(adress);
            string result;
            string procent;
            result = Regex.Match(newLine, @"<div class=""value"" id=""nseTradeprice"">(\-?\d+(\.\d{0,})?)</div>").Groups[1].Value;
            procent = Regex.Match(newLine, @"<span id=""nseNetchange"">(\-?\d+(\.\d{0,})?)</span>").Groups[1].Value;
            textBox1.Text = result;
            textBox2.Text = "Indian Oil Corporation Ltd.";
            textBox3.Text = procent;
            string adress1 = "http://economictimes.indiatimes.com/reliance-industries-ltd/stocks/companyid-13215.cms";
            string newLine1 = client.DownloadString(adress1);
            string result1;
            string procent1;
            result1 = Regex.Match(newLine1, @"<div class=""value"" id=""nseTradeprice"">(\-?\d+(\.\d{0,})?)</div>").Groups[1].Value;
            procent1 = Regex.Match(newLine1, @"<span id=""nseNetchange"">(\-?\d+(\.\d{0,})?)</span>").Groups[1].Value;
            textBox4.Text = "Reliance Industries Ltd.";
            textBox8.Text = result1;
            textBox12.Text = procent1;
            string adress2 = "http://economictimes.indiatimes.com/bharat-petroleum-corporation-ltd/stocks/companyid-11941.cms";
            string newLine2 = client.DownloadString(adress2);
            string result2;
            string procent2;
            result2 = Regex.Match(newLine2, @"<div class=""value"" id=""nseTradeprice"">(\-?\d+(\.\d{0,})?)</div>").Groups[1].Value;
            procent2 = Regex.Match(newLine2, @"<span id=""nseNetchange"">(\-?\d+(\.\d{0,})?)</span>").Groups[1].Value;
            textBox5.Text = "Bharat Petroleum Corporation Ltd.";
            textBox9.Text = result2;
            textBox13.Text = procent2;
            string adress3 = "http://economictimes.indiatimes.com/hindustan-petroleum-corporation-ltd/stocks/companyid-12078.cms";
            string newLine3 = client.DownloadString(adress3);
            string result3;
            string procent3;
            result3 = Regex.Match(newLine3, @"<div class=""value"" id=""nseTradeprice"">(\-?\d+(\.\d{0,})?)</div>").Groups[1].Value;
            procent3 = Regex.Match(newLine3, @"<span id=""nseNetchange"">(\-?\d+(\.\d{0,})?)</span>").Groups[1].Value;
            textBox6.Text = "Hindustan Petroleum Corporation Ltd.";
            textBox10.Text = result3;
            textBox14.Text = procent3;
            string adress4 = "http://economictimes.indiatimes.com/tata-motors-ltd/stocks/companyid-12934.cms";
            string newLine4 = client.DownloadString(adress4);
            string result4;
            string procent4;
            result4 = Regex.Match(newLine4, @"<div class=""value"" id=""nseTradeprice"">(\-?\d+(\.\d{0,})?)</div>").Groups[1].Value;
            procent4 = Regex.Match(newLine4, @"<span id=""nseNetchange"">(\-?\d+(\.\d{0,})?)</span>").Groups[1].Value;
            textBox7.Text = "Tata Motors Ltd.";
            textBox11.Text = result4;
            textBox15.Text = procent4;
            double[] myArray = new double[5];
            myArray[0] = Convert.ToDouble(procent);
            myArray[1] = Convert.ToDouble(procent1);
            myArray[2] = Convert.ToDouble(procent2);
            myArray[3] = Convert.ToDouble(procent3);
            myArray[4] = Convert.ToDouble(procent4);
            }
        }
        }