There are sample screenshot on the Codeplex site from were this project is migrated from: https://dropdownbuttonlib.codeplex.com/

This project is based on the drop down control contained in the Extended WPF Toolkit™ Community Edition:https://wpftoolkit.codeplex.com/ from Xceed. It includes some bugfixes to the original implementation and extends the original controls with a:

• DropDownButton, SplitButton with:
• DropDownItemsButton, SplitItemsButton

controls. The original implementation (DropDownButton, SplitButton) can be used to drop down and interact with single drop down items, while the extended controls (DropDownItemsButton, SplittItemsButton) are based on an ItemsControl and can thus be with multiple drop down items (in a similar fashion as a standard WPF ComboBox or ListBox control).

Load Light or Dark brush resources in you resource dictionary to take advantage of existing definitions.

    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/DropDownButtonLib;component/Themes/MetroDark.xaml" />
    </ResourceDictionary.MergedDictionaries>

    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/DropDownButtonLib;component/Themes/MetroLight.xaml" />
    </ResourceDictionary.MergedDictionaries>

These definitions do not theme all controls used within this library. You should use a standard theming library, such as:

• MahApps.Metro,
• MLib, or
• MUI

to also theme standard elements, such as, button and textblock etc.