New generation of Interactive and attractive dynamic web applications are developed by Silverlight Technology. It is developed by Microsoft on Dot Net 3.5 Frame work using eXtended Application Markup Language (XAML). User Interface Test Automation for Silverlight Applications plays a vital role in software industry; especially User Interface Test Automation (UITA) in new technology like Silverlight is a challenging task because of its high security and low accessibility. Agent Technology is intermediate software that provides a better bridge between User Interface Test Automation and Silverlight applications. There are many different software agents for each group of controls to do User Interface Test Automation. For example button control agent will take care of all buttons in User Interface Test Automation. In this paper we present the XAML User Interface test automation using Multi Agent System. The main goal of Test Automation for New Generation XAML Web Applications Using Multi Agent System are to reduce cost and time to perform User Interface Test Automation.

Key words: - User Interface, Test Automation, Silverlight XAML Applications and Multi Agent system Test Automation.