public void RaiseChange(string fullname)
        {
            fullname = FileProviderHelper.NormalizePath(fullname);
            ChangeTokenInfo matchInfo;

            if (_fileTokenLookup.TryRemove(fullname, out matchInfo))
            {
                FileProviderHelper.CancelToken(matchInfo);
            }
        }
 public IChangeToken CreateFileChangeToken(string pattern)
 {
     return(FileProviderHelper.GetOrAddFileChangeToken(pattern, _fileTokenLookup));
 }