In this session, we will walk through the structure and code of LinqToPI, a prototype developed by one of our partners, Atos Origin. LinqToPI is a LINQ (Language Integrated Query) Provider for the PI System and empowers .NET developers to query PI using in-code, SQL-like queries. Among other things, this makes it easy to serve PI data/information via WCF and use it with data binding in Silverlight/WPF. Mediated by OSIsoft experts and open to the audience's questions and comments, this session should be highly instructive as we assess what was done well and can be improved.