title: WPF Create a kind of "variable" in xaml code in order to use in the rest of xaml code
body: <p>I wonder whether in <code>xaml</code> there is the possibility to create a "kind" of variable and then use it for the rest of xaml code. For example, suppose many controls share the same width so can I declare width once in xaml and then use it in all the xaml code?</p>