public static void ToggleIcs(string connectionInterface, bool state)
    {
        string toggle;
        string par1;
        string par2;
        if (state){
            toggle = "EnableSharing";
            par1 = "0";
            par2 = "1";
        }else{
            toggle = "DisableSharing";
            par1 = "";
            par2 = "";
        }
        using (PowerShell powerShellInstance = PowerShell.Create())
        {
            // this script enables or disables internet sharing with the connectionInterface given.
            powerShellInstance.AddScript("" +
                "regsvr32 hnetcfg.dll /s;" +
                "$m = New-Object -ComObject HNetCfg.HNetShare;" +
                "$m.EnumEveryConnection |% { $m.NetConnectionProps.Invoke($_) };" +
                "$c = $m.EnumEveryConnection |? { $m.NetConnectionProps.Invoke($_).Name -eq '" + connectionInterface + "' };" +
                "$config = $m.INetSharingConfigurationForINetConnection.Invoke($c);" +
                "Write-Output $config.SharingEnabled;" +
                "Write-Output $config.SharingConnectionType;" +
                "$config." + toggle + "(" + par1 + ");" +

                "$m2 = New-Object -ComObject HNetCfg.HNetShare;" +
                "$m2.EnumEveryConnection |% { $m2.NetConnectionProps.Invoke($_) };" +
                "$c2 = $m2.EnumEveryConnection |? { $m2.NetConnectionProps.Invoke($_).DeviceName -Match 'Microsoft Hosted Network Virtual Adapter' };" +
                "$config2 = $m2.INetSharingConfigurationForINetConnection.Invoke($c2);" +
                "Write-Output $config2.SharingEnabled;" +
                "Write-Output $config2.SharingConnectionType;" +
                "$config." + toggle + "(" + par2 + ");");


            PSDataCollection<PSObject> outputCollection = new PSDataCollection<PSObject>();
            IAsyncResult result = powerShellInstance.BeginInvoke<PSObject, PSObject>(null, outputCollection);
            Console.WriteLine(DateTime.Now + ">> Started Powershell script");

            int i = 0;
            while (result.IsCompleted == false)
            {
                if (i != 60)
                {
                    Console.WriteLine(DateTime.Now + ">> Running script");
                }
                else
                {
                    Console.WriteLine(DateTime.Now + ">> Script takes too long. Stopping script");
                    powerShellInstance.Stop();
                }
                i++;
                Thread.Sleep(1000);
            }

            Console.WriteLine(DateTime.Now + ">> Executed Internet Sharing script");
        }
    }

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.