C# | BlockNet - Блокировка выхода в интернет

Не позволит пользователю выйти на какой-либо интернет ресурс путём блокировки через реестр.
После перехода на какой-нибудь ресурс пользователь увидит вот такое вот сообщение:

Ошибка подключения

Создадим класс NativeMethods.cs

using System;
using System.Runtime.InteropServices;

internal static class NativeMethods
{
[DllImport("wininet.dll")]
internal static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int dwBufferLength);
}

Код

using System;

using System.Runtime.InteropServices;



internal static class NativeMethods

{

   [DllImport("wininet.dll")]

   internal static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int dwBufferLength);

}

Создадим класс BlockIE.cs

using Microsoft.Win32;
using System;
using System.IO;
using System.Security;

public class BlockIE
{
private enum INTERNET_OPTION : int
{
INTERNET_OPEN_TYPE_PROXY = 3,
INTERNET_OPTION_REFRESH = 37,
INTERNET_OPTION_PROXY = 38,
INTERNET_OPTION_SETTINGS_CHANGED = 39,
INTERNET_OPTION_VERSION = 40,
INTERNET_OPTION_PER_CONNECTION_OPTION = 75
}

public static void Enabled(int block_internet)
{
string ProxyIP = "164.21.141.110:8888", ProxyEnable = "ProxyEnable", ProxyServer = "ProxyServer";
const string IE = @"Software\Microsoft\Windows\CurrentVersion\Internet Settings";
using (var hklmHive_x64 = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, Environment.Is64BitOperatingSystem ? RegistryView.Registry64 : RegistryView.Registry32))
{
using (RegistryKey runKey = hklmHive_x64.OpenSubKey(IE, Environment.Is64BitOperatingSystem ? true : false))
{
try
{
switch (block_internet)
{
case 0:
runKey?.DeleteValue(ProxyEnable);
runKey?.DeleteValue(ProxyServer);
Console.WriteLine("Proxy Delete!");
break;

case 1:
runKey?.SetValue(ProxyEnable, block_internet);
runKey?.SetValue(ProxyServer, ProxyIP);
Console.WriteLine("Proxy Installed");
break;
default:
break;
}
NativeMethods.InternetSetOption(IntPtr.Zero, (int)INTERNET_OPTION.INTERNET_OPTION_SETTINGS_CHANGED, IntPtr.Zero, 0);
NativeMethods.InternetSetOption(IntPtr.Zero, (int)INTERNET_OPTION.INTERNET_OPTION_REFRESH, IntPtr.Zero, 0);
}
catch (Exception) { }
}
}
}
}

Код

using Microsoft.Win32;

using System;

using System.IO;

using System.Security;



public class BlockIE

{

   private enum INTERNET_OPTION : int

   {

      INTERNET_OPEN_TYPE_PROXY = 3,

      INTERNET_OPTION_REFRESH = 37,

      INTERNET_OPTION_PROXY = 38,

      INTERNET_OPTION_SETTINGS_CHANGED = 39,

      INTERNET_OPTION_VERSION = 40,

      INTERNET_OPTION_PER_CONNECTION_OPTION = 75

   }



   public static void Enabled(int block_internet)

   {

      string ProxyIP = "164.21.141.110:8888", ProxyEnable = "ProxyEnable", ProxyServer = "ProxyServer";

      const string IE = @"Software\Microsoft\Windows\CurrentVersion\Internet Settings";

      using (var hklmHive_x64 = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, Environment.Is64BitOperatingSystem ? RegistryView.Registry64 : RegistryView.Registry32))

      {

         using (RegistryKey runKey = hklmHive_x64.OpenSubKey(IE, Environment.Is64BitOperatingSystem ? true : false))

         {

            try

            {

               switch (block_internet)

               {

                 case 0:

                 runKey?.DeleteValue(ProxyEnable);

                 runKey?.DeleteValue(ProxyServer);

                 Console.WriteLine("Proxy Delete!");

                 break;

                  

                 case 1:

                 runKey?.SetValue(ProxyEnable, block_internet);

                 runKey?.SetValue(ProxyServer, ProxyIP);

                 Console.WriteLine("Proxy Installed");

                 break;

                 default:

                 break;

               }

               NativeMethods.InternetSetOption(IntPtr.Zero, (int)INTERNET_OPTION.INTERNET_OPTION_SETTINGS_CHANGED, IntPtr.Zero, 0);

               NativeMethods.InternetSetOption(IntPtr.Zero, (int)INTERNET_OPTION.INTERNET_OPTION_REFRESH, IntPtr.Zero, 0);

            }

            catch (Exception) { }

          }

       }

   }

}

Блокируем:

BlockIE.Enabled(1);

Код

BlockIE.Enabled(1);

Разблокируем:

BlockIE.Enabled(0);

Код

BlockIE.Enabled(0);