[rayvega]

LinqBridge allows support for Linq to run on .NET 2.0. The description of how it works might provide some insight:

http://www.albahari.com/nutshell/linqbridge.aspx

[prospero]

That requires the .NET 3.0 compiler to work, which was my point: LINQ is largely a compile-time feature.

[gnaritas]

No, the features that were used to build LINQ were added to C#. LINQ was then built using them, and those same features are available to you to build anything similar.