检测XP，Vista或Windows 7，并根据操作系统的版本选择XAML样式

So I've been testing my styles on different versions of Windows with the same resolution. Most control styles look the same but others are a bit off. I want to create seperate styles for different versions of windows. Similar to the CSS/html technique where you create CSS files for different browers. I'm just curious if this is a good way on handling this issue? So I've been testing my styles on different ver