How to disconnect from the internet connection programatically [closed]

Question

Internet connection can be disconnected by unplugging the network cable.

How could i do this through c# program.

And again i need to connect to the internet connection after a while.

My system is connected with LAN, i should disconnect only my system from the internet.

Can anyone help me please??

Answer 1

You can disable/enable your NIC from the command line:

netsh interface set interface “Local Area Connection” disabled
netsh interface set interface “Local Area Connection” enabled

Replace "Local Area Connection" with the name of the Network Interface you want to disable.

You can call this from C# using something like the following:

Enable

static void Enable(string interfaceName)
{
    System.Diagnostics.ProcessStartInfo psi = 
        new System.Diagnostics.ProcessStartInfo("netsh", "interface set interface \"" + interfaceName + "\" enable");
    System.Diagnostics.Process p = new System.Diagnostics.Process();
    p.StartInfo = psi;
    p.Start();
}

Disable

static void Disable(string interfaceName)
{
    System.Diagnostics.ProcessStartInfo psi = 
        new System.Diagnostics.ProcessStartInfo("netsh", "interface set interface \"" + interfaceName + "\" disable");
    System.Diagnostics.Process p = new System.Diagnostics.Process();
    p.StartInfo = psi;
    p.Start();
}