I think that every WPF developer knows that is Snoop. This is helpful tool (with source code (!!) ) for visual debugging of WPF's app at runtime. It is good but I was in need of some expansions. 1. I needed to see Template of controls in visual tree. 2. I needed to keep a/some couple (value and property) of control in visual tree. I implemented this issues for self purpose and want to impart this to all.