Step 1

Download and install following Visual Studio 2010 plugins

Visual Studio 2010 SharePoint Power Tools

Silverlight SharePoint Web Parts

Step 2

Create new Silverlight project and then create new Empty SharePoint Project in sandbox Solution

Step 3

Right click SharePoint Project then Click Properties SharePoint tab Check Enable Silverlight Debugging

Step 4

SharePoint Project Create new item of Silverlight webpart

Step 5

Add reference in SharePoint Silverlight OM dll in “C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ClientBin”
following location

Step 6

Add Following Code in Silverlight Project App.xaml.cs at Application_Startup function
ApplicationContext.Init(e.InitParams, SynchronizationContext.Current);

Step 7

Set as Startup in SharePoint Project, now we can run (f5) then navigate “Site pages” then we can see then new page relevant name of project,We can access the page for debugging.