IOException: 磁盘空间不足。

StackTrace:
   在 System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   在 System.IO.FileStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
   在 System.IO.FileStream.FlushWrite(Boolean calledFromFinalizer)
   在 System.IO.FileStream.Dispose(Boolean disposing)
   在 System.IO.FileStream.Finalize()

IOException: 磁盘空间不足。

StackTrace:
   在 System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   在 System.IO.FileStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
   在 System.IO.FileStream.Write(Byte[] array, Int32 offset, Int32 count)
   在 System.Windows.Media.Imaging.BitmapDownload.ReadCallback(IAsyncResult result)
   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)