Query Data with Parallel LINQ

The code shown in this post uses a pre-release version of PLINQ called the Microsoft Parallel Extensions to .NET Framework 3.5. When PLINQ finally ships, it will run only on .NET 4.0 or later. The version I'm using that runs on top of 3.5 is for evaluation purposes only. There will never be a shipping version that runs on .NET 3.5.