SEHException
   在 System.Net.UnsafeNclNativeMethods.UnsafeWinInetCache.DeleteUrlCacheEntryW(String urlName)
   在 System.Net.Cache._WinInetCache.Remove(Entry entry)
   在 Microsoft.Win32.WinInetCache.TryRemove(String key, Boolean forceRemove)
   在 System.Net.Cache.RequestCacheProtocol.EnsureCacheRemoval(String retrieveKey)
   在 System.Net.Cache.RequestCacheProtocol.CheckUpdateOnResponse(Stream responseStream)
   在 System.Net.Cache.RequestCacheProtocol.GetUpdateStatus(WebResponse response, Stream responseStream)
   在 System.Net.HttpWebRequest.CheckCacheUpdateOnResponse()
   在 System.Net.HttpWebRequest.CheckResubmitForCache(Exception& e)
   在 System.Net.HttpWebRequest.DoSubmitRequestProcessing(Exception& exception)
   在 System.Net.HttpWebRequest.ProcessResponse()
   在 System.Net.HttpWebRequest.SetResponse(CoreResponseData coreResponseData)
   在 System.Net.ConnectionReturnResult.SetResponses(ConnectionReturnResult returnResult)
   在 System.Net.Connection.ReadComplete(Int32 bytesRead, WebExceptionStatus errorStatus)
   在 System.Net.LazyAsyncResult.Complete(IntPtr userToken)
   在 System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
   在 System.Net.Security._SslStream.ProcessFrameBody(Int32 readBytes, Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
   在 System.Net.Security._SslStream.ReadFrameCallback(AsyncProtocolRequest asyncRequest)
   在 System.Net.AsyncProtocolRequest.CompleteRequest(Int32 result)
   在 System.Net.FixedSizeReader.CheckCompletionBeforeNextRead(Int32 bytes)
   在 System.Net.FixedSizeReader.ReadCallback(IAsyncResult transportResult)
   在 System.Net.LazyAsyncResult.Complete(IntPtr userToken)
   在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   在 System.Net.ContextAwareResult.Complete(IntPtr userToken)
   在 System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
   在 System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
   在 System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)