C# 调用 Web Service 时出现 : 407 Proxy Authentication Required错误的解决办法

            // 记得 using  System.Net;

　　　　　　　System.Net.WebProxy myProxy = new System.Net.WebProxy("localhost:9099", true);
            myProxy.Credentials = CredentialCache.DefaultCredentials;
            wsTest.Service client = new wsTest.Service();
            client.Proxy = myProxy;
            string rtnValue = client.HelloWorld();