# 2020 v1

## Content



### CollectionView

**Breaking changes**

*   Removed C1.CollectionView (using C1.DataCollection instead).

### FlexViewer

**Bug fixes**

*   Fixed the issue where System.ArgumentOutOfRange Exception occurs when closing document after searching text in FlexViewer.
*   Fixed the issue where pages are shown left-aligned in FlexViewer when setting 'Actual Size/Whole Page' zoom-mode.
*   Fixed the issue where selection highlights do not match with search results starting form second page of document.
*   Fixed the issue where correct page is not navigated by entering page number in PageNumber-box when setting 'PageDisplayMode' more than one page.
*   Fixed the issue where System.ArgumentOutOfRange Exception occurs when closing document after searching text in FlexViewer.
*   Fixed the issue where pages are not applied with customized themes and background color is still not applied after navigating pages.
*   Fixed the issue where keyboard closes automatically after opening to edit in PageNumber box.
*   Fixed the issue where color is not applied at left border of page when setting 'PageBorderColor' property in FlexViewer.

**Improvements**

*   Support Dark/Light theme based on Dark/Light OS mode.
*   Add RotationMode property.
*   Add ShowPrintDialog method
*   Add Printing Feature.
*   Add Export menu item.
*   Add Rotate left/right menu items