在 VS2005 VB.NET 项目中，我们使用第三方 asmx 服务来转换帐号。
在开发机器上一切正常，但在生产服务器上，当我们调用服务时会抛出异常。
这是一个例外：
System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
--- End of inner exception stack trace ---
at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at KlantenApplicatie.BL.IbanConversie.IBANBIC.calculateIBAN1(String ISOcountry, String account)
at KlantenApplicatie.BL.Relatie.SpecGegFiscTOWBasisinfoBL.convertToIban(String rekeningNummer)
出现异常需要一些时间。