Source (Silverlight Plug-in Object)
See SilverlightHost.Source. This property is read-only for managed code.
Changing the Source value at run time is not enabled through any managed API. You must use the DOM or manipulate the hosting HTML page in order to change the Source value for a managed-API application. In managed APIs, typically you would instead use a navigation framework or metaphor that does not require reloading the source XAP; see Navigation Overview.
The string value of the Source property is interpreted as a URI instead of as an Internationalized Resource Identifier (IRI). Characters that are used to identify a Source value that are outside the US-ASCII character set must be encoded.
A Source URI can represent a relative path. The relative path is based on the location of the HTML page that contains the object element. If you use a relative path, always use the slash character (/) for traversal. Silverlight does not support the backslash character (\) for relative paths.