PathTooLongException: 指定的路径或文件名太长，或者两者都太长。完全限定文件名必须少于 260 个字符，并且目录名必须少于 248 个字符。
StackTrace:
   在 System.IO.Path.LegacyNormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
   在 System.IO.Path.GetPathRoot(String path)
   在 System.IO.RenamedEventArgs.get_OldFullPath()
   在 Microsoft.Extensions.FileProviders.Physical.PhysicalFilesWatcher.OnRenamed(Object sender, RenamedEventArgs e)
   在 System.IO.FileSystemWatcher.OnRenamed(RenamedEventArgs e)
   在 System.IO.FileSystemWatcher.CompletionStatusChanged(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* overlappedPointer)
   在 System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)