In my last two screencasts I showed how you can use and implement IValueConverter to control the data binding process. This time we continue our exploration of the data binding customizations and see what does multi-binding mean and how to use and implement IMultiValueConverter . Please notice that the screencast was recorded in Hebrew, but the demo is clear enough to be watched without understanding a word. You can watch the screencast on YouTube HD here . Or here, embedded in my blog: ...