how to connect disconnect network router through c#.net

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Management;
using ROOT.CIMV2.Win32;

namespace NetworkRouterRestart
{
    class Program
    {
        static void Main(string[] args)
        {
            //System.Management.ManagementObjectSearcher searcher = new System.Management.ManagementObjectSearcher("root\\CIMV2", "select * from Win32_NetworkAdapter");
            //ManagementObjectCollection coll = searcher.Get();
            //foreach (ManagementObject obj in coll)
            //{
            //    Console.WriteLine(obj.ClassPath.ClassName);
            //    string name = obj.Properties["Name"].Value.ToString();
            //    if (name.Contains("Wireless"))
            //        obj.InvokeMethod("Disable", null);
            //}
            //Console.WriteLine("Disabled. Press a key to reenable.");
            //Console.ReadLine();

            //foreach (ManagementObject obj in coll)
            //{
            //    string name = obj.Properties["Name"].Value.ToString();
            //    if (name.Contains("Wireless"))
            //        obj.InvokeMethod("Enable", null);
            //}
            //Console.WriteLine("Enabled. Press any key to continue...");
            //Console.ReadLine();

            SelectQuery query = new SelectQuery("Win32_NetworkAdapter", "NetConnectionStatus=2");
            ManagementObjectSearcher search = new ManagementObjectSearcher(query);
            foreach (ManagementObject result in search.Get())
            {
                NetworkAdapter adapter = new NetworkAdapter(result);

                // Identify the adapter you wish to disable here.
                // In particular, check the AdapterType and
                // Description properties.

                // Here, we're selecting the LAN adapters.
                if (adapter.AdapterType.Equals("Ethernet 802.3"))
                {
                    adapter.Disable();
                }
            }

            query  = new SelectQuery("Win32_NetworkAdapter", "NetConnectionStatus=0");
            search = new ManagementObjectSearcher(query);
            foreach (ManagementObject result1 in search.Get())
            {
                NetworkAdapter adapter1 = new NetworkAdapter(result1);
                adapter1.Enable();
            }
        }
    }
}

HOW-TO: Disable/Enable Network Connections Programmatically under Vista

I got an email last week asking about how to disable a particular network connection under Vista. The specific scenario, how to disable an active 3G connection, is not something I'm going to cover, but what I present below could be used as basis for that scenario.

With Vista, Microsoft introduced two new methods to the Win32_NetworkAdapter class under WMI:Enable and Disable. Before can call either of those methods, we need to know how to enumerate the network connections.

The .NET Framework SDK provides a helpful utility called mgmtclassgen.exe, which can be used to create .NET-friendly wrappers of the WMI classes. Open up a Visual Studio command prompt and enter the following:

mgmtclassgen Win32_NetworkAdapter -p NetworkAdapter.cs

This will generate a file called NetworkAdapter.cs which will contain a C# representation of the WMI Win32_NetworkAdapter class. You can add this source code file to your C# project and then access all the properties without too much extra effort.

To filter and disable the specific adapters, you do something like this:

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1. SelectQuery query = new SelectQuery("Win32_NetworkAdapter", "NetConnectionStatus=2");  
2. ManagementObjectSearcher search = new ManagementObjectSearcher(query);  
3. foreach(ManagementObject result in search.Get())  
4. {  
5.     NetworkAdapter adapter = new NetworkAdapter(result);  
6.   
7.     // Identify the adapter you wish to disable here.   
8.     // In particular, check the AdapterType and   
9.     // Description properties.  
10.   
11.     // Here, we're selecting the LAN adapters.  
12.     if (adapter.AdapterType.Equals("Ethernet 802.3"))   
13.     {  
14.         adapter.Disable();  
15.     }  
16. }  

Don't forget to add a reference to System.Management.dll!

http://msdn.microsoft.com/en-us/library/windows/desktop/aa394216(v=vs.85).aspx

Value	Meaning
0 (0x0)	Disconnected
1 (0x1)	Connecting
2 (0x2)	Connected
3 (0x3)	Disconnecting
4 (0x4)	Hardware not present
5 (0x5)	Hardware disabled
6 (0x6)	Hardware malfunction
7 (0x7)	Media disconnected
8 (0x8)	Authenticating
9 (0x9)	Authentication succeeded
10 (0xA)	Authentication failed
11 (0xB)	Invalid address
12 (0xC)	Credentials required