How to improve the appearance of a WPF program?

Question

.NET

Hello!
I am writing a program in WPF. I would like to give the application a beautiful modern look. This is especially true for the DataGrid. Interested in something in the colors of Microsoft Office or similar. I saw how the controls are designed in DevExpress, something like this is needed. It would be very nice if the theme changed the appearance of the entire application at once: the background, buttons, tables, etc. And further. Where you can see recommendations or rules on how the application should be designed as a whole: the size of buttons, menus, status bars, drop-down lists, and other things; perhaps, recommendations on the arrangement of elements in the window and their layout for some typical tasks (for example: adding a new employee, input form, menu organization, etc.).
Thanks in advance.

Answer 1

Use (XAML) project. There you can arrange it in the style of Metro
professorweb.ru/my/WPF/documents_WPF/level35/35_1.php
Everything is described in detail and clearly :)

Answer 2

Telerik (available on the root tracker)

Answer 3

Try ModernUI .
The screenshots look pretty nice.
Available for free through NuGet.
You can also try datagridthemesfromsl.codeplex.com/.
And here are some more great MaterialDesing themes .