The current worksheet is not updated if the workbook is set while the control is disabled.

Workaround: 

RadSpreadsheet exposes API enabling the users to control the visibility of the sheet selector:

RadSpreadsheetSheetSelector.SetIsSheetSelectorVisible(radSpreadsheet, isVisible);

When the SetIsSheetSelectorVisible method is invoked with false value for the isVisible parameter, its parent container is still visible in the UI.

When attaching to the CellPropertyChanged event and trying to modify the cell an exception is thrown:

if firstly detached from the event and then modify the cell the exception is: 
System.InvalidOperationException: 'Collection was modified; enumeration operation may not execute.' 

else:
System.StackOverflowException: 'Exception of type 'System.StackOverflowException' was thrown.'

If a workbook contains a worksheet with RowHeight bigger than 600px (SpreadsheetDefaultValues.MaxRowHeight), an exception is thrown while trying to import such a document. 

Please add support for cell content rotation.

I know that this is listed in the known unsupported features article, but just to be extra clear about what I am requesting, here's an example from Microsoft Excel

When the column width is decreasing below the size of the filter button the size of the button remains the same and overlaps the previous button.

The scroll exceeds the visible area when using the auto-fill.

Steps to reproduce:

- Set the VisibleSize to (10 ,10)

- Drag the autofill icon down

At this point, the ribbon and the context menu are not localized out of the box and the users need to change the strings manually.