ArcGIS Runtime SDK 1.0 for WPF was released June 2012 and supports ArcGIS Server 10.1 and the latest edition of ArcGIS Online. See the new ArcGIS Resource Center for more details.

The ArcGIS API for WPF enables you to create rich desktop applications that utilize the powerful mapping, geocoding, and geoprocessing capabilities provided by ArcGIS Server and Bing™ services. The API is built on the Microsoft WPF platform which is integrated with Visual Studio 2010 and Expression Blend 4.

To use the API, simply download and install the ArcGIS API for WPF and start creating your WPF apps with Visual Studio 2010 or Expression Blend 4.