Mobilize.NET has released the Silverlight bridge that lets the developers to migrate their Windows Phone 8.1 (Silverlight) app to Universal Windows Platform (USP).
The Mobilize.NET Silverlight Bridge for UWP is a free add-in for Microsoft Visual Studio which provides options for the Windows Phone Silverlight Developers to migrate and create a UWP version of the project. The tool resolves the namespaces , maps the Silverlight APIs to the new UWP APIs etc.
The tool additionally supports open source extensibility model so that anyone can contribute the mapping.
Know more about the Mobilize.NET Silverlight Bridge and download it from http://www.mobilize.net/download-silverlight-bridge