Two ways to check whether the network is connected in C #

Using System;
2 using System.Collections.Generic;
3 using System.Text;
4//Method one
5 using System.Runtime;
6 using System.Runtime.InteropServices;
7//Method two Net2.0 new class library
8 using System.Net.NetworkInformation;
9
Ten namespace Internetcheck
11 {
public class Internet
13 {
[DllImport ("Wininet.dll")]
The private extern static bool InternetGetConnectedState (int Description, int reservedvalue);
16
#region Method One
//<summary>
19///For checking whether the network can connect to the Internet, True indicates a successful connection, false indicates a connection failure
</summary>
///<returns></returns>
public static bool Isconnectinternet ()
23 {
Description int = 0;
Return InternetGetConnectedState (Description, 0);
26}
#endregion
28
#region Method Two
<summary>
31///To check whether the IP address or domain name can be accessed using the TCP/IP protocol (using the ping command), True indicates Ping succeeded, false indicates Ping failed
</summary>
//<param Name= "stripordname" > Input parameters, indicating IP address or domain name </param>
<returns></returns>
public static bool Pingipordomainname (string stripordname)
36 {
PNS Try
38 {
Objpingsender ping = new ping ();
PingOptions objpinoptions = new PingOptions ();
Objpinoptions.dontfragment = true;
The String data = "";
byte[] buffer = Encoding.UTF8.GetBytes (data);
inttimeout int = 120;
Pingreply objpinreply = Objpingsender.send (stripordname, inttimeout, buffer, objpinoptions);
Strinfo string = objPinReply.Status.ToString ();
if (Strinfo = = "Success")
48 {
The return true;
50}
Or else
52 {
The return is false;
54}
55}
Exception catch ()
57 {
The "+" return false;
59}
60}
#endregion
62}
63}

Two ways to check whether the network is connected in C #