System.Net.WebException: 无法连接到远程服务器 ---> System.Net.Sockets.SocketException: 由于目标计算机积极拒绝,无法连接。 122.114.89.5:80 在 System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) 在 System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket