Recently , i have given session on Silver light 4. Where Participants posted be question of Differences between Silverlight ,XBAP and WPF. Though I have given answer in the session, i want to make sure other participant who could not turn session and having same doubt to clarify.
Firstly: XBAP is XAML Browser application , It require .NET Framework to installed on the machine where it runs. it is Depployed through Click Once gets updated with latest version. XBAP application should be online and run in Browser scope. It is almost same as WPF but with Browser scope. It works on only Window Operation. I think it is best option for intranet browser applications.WCF not supported. Only FireFox and IE
Secondly Silverlight, It is require .NET Compact framework to be present in Browser. It works very where indepedent of platform and browser. it has limitation of Triggers, No DynamicResource. Rendered along with HTMl content
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