用c#监控网络状态

using  Microsoft.VisualBasic.Devices;

//判断当前网络连接状态

Network nw=new Network();

if(nw.IsAvailable)

lbmsg.Text="网络已连接";

else

lbmsg.Text="网络已断开";

using System.Net.NetworkInformation;
// Constructor
public MainPage()
{
InitializeComponent();

// Subscribe to the NetworkAvailabilityChanged event
DeviceNetworkInformation.NetworkAvailabilityChanged += new EventHandler<NetworkNotificationEventArgs>(NetworkAvailabilityChanged);
}

void NetworkAvailabilityChanged(object sender, NetworkNotificationEventArgs e)
{

string msg="";
if(e.IsAvailable)
{
msg="网络已连接";

}
else
{
msg="网络已断开";
}
Dispatcher.BeginInvoke(() => {
lbmsg.Text =msg; });
}