突然某一天获取openid时这样了，

[IOException: 由于远程方已关闭传输流，身份验证失败。]
   System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) +6163337
   System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) +85
   System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) +61
   System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) +137
   System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) +143
   System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) +99
   System.Net.TlsStream.CallProcessAuthentication(Object state) +47
   System.Threading.ExecutionContext.runTryCode(Object userData) +80
   System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) +0
   System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) +105
   System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) +125
   System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) +43
   System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) +798
   System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) +58
   System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) +26
   System.Net.ConnectStream.WriteHeaders(Boolean async) +139