ComponentOne Studio WPF provides a MultiSelect Drop Down with tag editing features.
ComponentOne WPF Edition is a collection of easy-to-use WPF components, including advanced grids, charts, reporting, and scheduling controls for .NET applications. These controls are built with XAML to promote collaboration in your team and are fully compatible with the XBAP deployment capabilities of Windows Presentation Foundation.
In this blog post, GrapeCity's Greg Lutz takes you through the process of enabling users to select multiple values using the MultiSelect ComboBox - which works great with MVVM data binding or MVVM (Model-View-ViewModel) structured applications. This gives your applications the capability of selecting multiple items in one field like a "select all that apply" survey question. Detailed code samples are included.
Read this informative GrapeCity blog to add this unique dimension to your WPF applications.