Unhandled Exception: System.IO.InvalidDataException: Central Directory corrupt. ---> System.IO.IOException: An attempt was made to move the file pointer before the beginning of the file.

   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.SeekCore(Int64 offset, SeekOrigin origin)
   at System.IO.FileStream.Seek(Int64 offset, SeekOrigin origin)
   at System.IO.Compression.ZipArchive.ReadEndOfCentralDirectory()
   --- End of inner exception stack trace ---
   at System.IO.Compression.ZipArchive.ReadEndOfCentralDirectory()
   at System.IO.Compression.ZipArchive.Init(Stream stream, ZipArchiveMode mode, Boolean leaveOpen)
   at System.IO.Compression.ZipArchive..ctor(Stream stream, ZipArchiveMode mode, Boolean leaveOpen, Encoding entryNameEncoding)
   at System.IO.Compression.ZipFile.Open(String archiveFileName, ZipArchiveMode mode, Encoding entryNameEncoding)
   at System.IO.Compression.ZipFile.ExtractToDirectory(String sourceArchiveFileName, String destinationDirectoryName, Encoding entryNameEncoding)
   at System.IO.Compression.ZipFile.ExtractToDirectory(String sourceArchiveFileName, String destinationDirectoryName)
   at MediocreUpdater.Program.downloadCompelete(Object sender, AsyncCompletedEventArgs e)
   at System.Net.WebClient.OnDownloadFileCompleted(AsyncCompletedEventArgs e)
   at System.Net.WebClient.DownloadFileOperationCompleted(Object arg)
   at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()