Now supports Twitter API v1.1!
Supports .NET 3.5, .NET 4.0, Silverlight 4.0, Windows Phone 7.1, Client Profile, and Windows 8.
100% Twitter API coverage.LINQ to Twitter Samples
contains example code for using LINQ to Twitter with various .NET technologies. Downloadable source code also has C# samples in the LinqToTwitterDemo project and VB samples in the LinqToTwitterDemoVB project.
Also on NuGet