If you are testing a Silverlight In-Browser web application, we recommend treating it as a standard Web Test with no additional configuration.
See here for what constitutes Out-of-Browser.
Once a Silverlight Out-of-Browser application is configured for recording, Test Studio modifies its shortcut to point directly to the application's location on disk. This replaces the Microsoft "offline://" notation. The side effect of this is that your application will not detect that it is running in Out-of-Browser mode and code must be written in the application to work around this limitation.
Test Studio does not support the Web Browser control in Silverlight Out-of-Browser applications.
- Launch Test Studio.
Click Telerik > Test Studio > Create New Test Project.
Choose Telerik > Test > VB or C# Test Studio Project, name the project, and click OK.
Note: As of version 2015.3.1202 Test Studio projects will appear only under .NET Framework 4.5 or higher.
A Web Test is added to the project. Open it and click the Configure Silverlight App icon in the toolbar.
Check the Configure this test to run against a Silverlight application box in Out-Of-Browser options.
- Browse for the Local Application Directory or drag and drop a link to your Silverlight application.
Select Silverlight Out-of-Browser under Recording Host.
Click Record to launch the out-of-browser app with the recording toolbar docked at the top.
Notice that steps are added to the test as actions are taken within the application.