C#检测网络连接

using System.Net.NetworkInformation;

Ping ping = new Ping();
try
{
PingReply reply = ping.Send("www.baidu.com");

if (reply.Status == IPStatus.Success)
{
Image img = Image.FromFile("Success.png");
pictureBox1.Image = img;

label1.Text = "网络连接正常";
}
}
catch (Exception)
{
Image img = Image.FromFile("Fail.png");
pictureBox1.Image = img;

label1.Text = "网络连接超时";

}