webservice代理类使用证书调用

private void button1_Click(object sender, EventArgs e)
{
X509Certificate2 cert = new X509Certificate2(@"c:/ze.pfx", "limingze");

WR.WebService1 ws = new WindowsFormsApplication1.WR.WebService1();

System.Net.ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(RemoteCertificateValidationCallback);

ws.ClientCertificates.Add(cert);

string str = ws.HelloWorld();
MessageBox.Show(str);
}