Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
This operator enables the common idiom of combining a namespace and a local name in the construction of an element or attribute. This idiom provides some of the benefits of having namespace prefixes, in that you can refer to a namespace using a variable that is short. This eliminates syntactic noise in the code that creates XML trees.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.