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The use-case is very simple, we have this form (shown below) that takes in a Person object with three properties namely Surname, First Name and Age - and as you enter them into the form, it updates the title of form with the full name derived from what you have entered. Nothing fancy, but the idea is that we should be able to consume two or more fields through one binding (as in multi-bind).

This blog post written by Colin Eberhardt describes a technique for associating multiple bindings with a single dependency property within Silverlight applications.

WPF already has this functionality in the form of MultiBindings, the code in this post emulates this function. The simple application below demonstrates this technique, where there are three data-entry text boxes bound to the individual properties of a simple Person object, with the title text block being bound to both the Forename and Surname properties. Try editing the surname or forename fields and watch as the title is updated.