Whenever you open or save a file in almost any Windows application, you will see roughly the same dialogs for doing so. As of R3 2017 you can keep the UI appearance throughout your application consistent with the new file dialogs provided by the Telerik UI for WPF suite.
Apart from support of all predefined themes of the suite, the controls provide most of the functionality of the standard MS dialogs while leaving room for further customization.
Here are a few of the controls' main features:
Easy Navigation: The dialogs allow you to easily browse through your file system either through the tree-view-like navigation pane or the breadcrumb/path pane. A history of the visited folders is kept so that you can seamlessly jump back and forth between folders.
Search: The out-of-the-box search functionality allows you to quickly find just the files and folders you're looking for by using the Windows Search index when available.
Customizable Layouts: The controls also provide you with an API to set an InitialDirectory, specify custom folders to be displayed top-most in the navigation pane and switch between different view modes (Tiles, Small Icons, Large Icons, etc.).
Variety of Themes: You can persist the appearance throughout your application by applying any of the predefined themes provided by the UI for WPF suite to your dialogs.
Get started with the file dialogs with the Getting Started help article that shows how to use them in basic scenarios.
Check out the controls' demos at demos.telerik.com