This video is taken from LightSwitch Developer
Center published by Microsoft. http://msdn.microsoft.com/en-us/lightswitch/gg604823
In this video you will learn how to create a
master-details (one-to-many) edit screen in Visual Studio LightSwitch. You will
see how to use the Screen Designer to add child collections to a screen as well
as how to create a new default edit screen with an editable child grid.
Thank you..