C#HTTP????????????????

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
using Microsoft.Win32;

namespace UtilSp.ClassLib
{
    public class ProxySp
    {
        [DllImport("wininet.dll"?? SetLastError = true)]
        private static extern bool InternetSetOption(IntPtr hInternet?? int dwOption?? IntPtr lpBuffer?? int lpdwBufferLength);

        private const int INTERNET_OPTION_REFRESH = 37;
        private const int INTERNET_OPTION_PROXY = 38;
        private const int INTERNET_OPTION_SETTINGS_CHANGED = 39;
        private const int INTERNET_OPEN_TYPE_PROXY = 3;
        private const int INTERNET_OPEN_TYPE_DIRECT = 1;

        #region changeUserAgent Function
        public static void changeUserAgent()
        {
            var appName = Process.GetCurrentProcess().MainModule.ModuleName;
            RegeditSp.write(@"HKEY_LOCAL_MACHINESOFTWAREMicrosoftInternet ExplorerMAINFeatureControlFEATURE_BROWSER_EMULATION"?? appName?? 9999?? RegistryValueKind.DWord);
        }
        #endregion

        #region setProxyEnabled Function
        /// <summary>
        /// Set proxy.
        /// </summary>
        /// <param name="isProxyEnabled">true:is enabled.false:is not enabled.</param>
        /// <param name="proxyIP">Proxy ip and port.Format:192.168.100.162:8080</param>
        /// <returns></returns>
        public static bool setProxy(bool isProxyEnabled?? string proxyIP = "")
        {
            string regPath = "Software\Microsoft\Windows\CurrentVersion\Internet Settings";//Enabled proxy option.
            bool isSetProxyEnabledOk =
                RegeditSp.write(RegeditSp.REGEDIT_ROOT_SET.HKEY_CURRENT_USER??
                                regPath??
                                "ProxyEnable"??
                                isProxyEnabled ? 1 : 0??
                                true);
            bool isSetProxyIP = true;
            if (!string.IsNullOrEmpty(proxyIP))
            {
                isSetProxyIP = RegeditSp.write(RegeditSp.REGEDIT_ROOT_SET.HKEY_CURRENT_USER??
                                                regPath??
                                                "ProxyServer"??
                                                proxyIP??
                                                true);
            }
            bool isConnectionOK=setConnection(isProxyEnabled?? proxyIP);
            bool isNotifyOk = InternetSetOption(IntPtr.Zero?? INTERNET_OPTION_SETTINGS_CHANGED?? IntPtr.Zero?? 0);//Notify proxy in the regedit has changed.Lanuch proxy when connect next.
            bool isReadOK = InternetSetOption(IntPtr.Zero?? INTERNET_OPTION_REFRESH?? IntPtr.Zero?? 0);//Read proxy from regedit.
            return isSetProxyEnabledOk && isSetProxyIP && isNotifyOk && isReadOK && isConnectionOK;
        }
        #endregion

        #region setConnection Function
        private static bool setConnection(bool isProxyEnabled?? string proxyIP)
        {
            string regPath = "Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections";//Connection register option.
            byte[] szBuf = new byte[80];
            szBuf[0] = 0x3c;
            szBuf[4] = 0x09;
            szBuf[8] = (byte)(isProxyEnabled ? 0x03 : 0x01);

            szBuf[12] = (byte)proxyIP.Length;
            for (int i = 0; i < proxyIP.Length; i++)
            {
                szBuf[i + 16] =(byte)Convert.ToInt32(proxyIP[i]);
            }
            string local = "<local>";
            for (int j = 0; j < 7; j++)
            {
                szBuf[20 + proxyIP.Length + j] = (byte)Convert.ToInt32(local[j]);
            }

            return RegeditSp.write(RegeditSp.REGEDIT_ROOT_SET.HKEY_CURRENT_USER??
                                regPath??
                                "???????"??
                                szBuf??
                                true);
        }
        #endregion
    }
}