public override DateTime GetLastWriteTime(FileManagerFolder folder)
{
DateTime result;
Item folderItem = FindFolderItem(folder);
if (!FolderLastWriteTimeCache.TryGetValue(folderItem.Id, out result))
{
result = DocumentsApp.FileSystem.GetFolderLastWriteTime(folderItem);
FolderLastWriteTimeCache.Add(folderItem.Id, result);
}
return(result);
}
protected void ClearFolderLastWriteTimeCache()
{
FolderLastWriteTimeCache.Clear();
}
