I want to share with you my open source project.
The purpose of my project is to demonstrate my visual filter builder WPF control in use. FilesFilter application allows you to filter your files by many parameters applying filtering expressions. Essentially my WPF user control builds LINQ binary tree lambda expressions to select a subset of items from a list. In terms of C sharp code it can be applied to lists of elements of any given classes. If you need such a filtering expression builder, you're welcome to use my component in your projects. Any changes and improvements would be also very much appreciated.
Please, take a look at this:
I think you may find it useful and interesting.