Create a Shape Designer app similar to Blend but MUCH more simple. The user can create basic shapes - Lines, Polygon, Rectangle, Ellipse, etc. This app then saves the path data to a meta-data file that my designer uses to load a toolbox.
Thank You For reply but I have tried it and bind this value to property in view model and added breakpoint to that but after selecting multiple items command didn't break at that point therefore multiple items didn't get there
the problem is that the default control template for ListBoxItem contains a border element which controls the background color. To fully control the appearance you could replace the template using the template from ListBoxItem ControlTemplate Example[^] with your own definition. See below for an example.