When DetailsView is set from the drop-down, the Date Modified column is not updated. For example, if the dialog is opened at a specific place and we modified a file (edit, replace) from an external place (source), Date Modified does not reflect the changed date.

1. Open QSF > File Explorer example
2. Navigate to a folder with many subfolders 
3. Type something is search

You will see that the whole QSF freezes. 
 

In .NET Core (or newer) the search textbox doesn't work. 

The problem is reproducible with the Demo application >> File Dialogs >> First Look example:

When opening the Folder Dialog (all in default, no changes needed) and then we click between "My PC" and "C:" back and forth quite rapidly, eventually the dialog freezes and after a while throws an unhandled exception. It is important to click between both quite fast for the issue to show.

Two different types of errors may occur:

Use the Demo application >> File Dialogs >> First Look example.  I have tested typing "\\DYORDANOLAP" and hitting Enter and it seems to navigate to the folder only after pressing Enter a second time:

Expected: In the Windows File Explorer, the user is navigated to the respective folder after the first time the user hits Enter.

In this case, by default hidden files/folders are not visible. When we hide a file/folder while the explorer control is visible, the hidden file/folder will still be present in the UI, thus allowing the user to navigate to it. 

Currently, the dialogs provide a way to restore the last open directory. The opened directory path will be stored in a private string field of the RadOpenFolderDialog instance. However, in other this to work, the dialogs require the following steps:

• The same dialog instance should be used every time you open the dialog.
• In order for the directory to be saved the directory should be opened. Clicking cancel or the X button won't save the directory.
• Closing the application and then opening it again, or generally when you create a new dialog instance, the last saved directory will get lost.

We could expose a mechanism to cache the last open directory outside of the dialogs, thus allowing you to restore the directory even when the application is closed.