I am a Microsoft Certified Application Developer MCAD Chartered Member (C# .Net)and born in Bangladesh. I am a co-founder and core developer of Pageflakes www.pageflakes.com and CEO at Simplexhub, a highly experienced software development company based in Melbourne Australia and Dhaka, Bangladesh. Simplexhub, is on its mission to build a smart virtual community in Bangladesh and recently launched beta realestatebazaar.com.bd an ASP.NET MVC application written in C#.NET.
Check out the following from Matt Warrens blog posts, if you are interested on how to implement IQueryable Provider.
source: http://blogs.msdn.com/mattwar/archive/2007/07/30/linq-building-an-iqueryable-provider-part-i.aspx
Part I - Reusable IQueryable base classesPart II - Where and reusable Expression tree visitorPart II - Local variable referencesPart IV - SelectPart V - Improved Column bindingPart VI - Nested queriesPart VII - Join and SelectMany