Welcome to the fifty-third edition of Community Convergence. Here at Microsoft the C# team is still busy polishing C# 4.0 so that is shines and glistens. Below I provide some links to recent articles of interest by C# team developers, other Microsoft employees, and community members. Included is a fun video by Kirill Osenkov on his Live Geometry library, and a Jason Zander link to the new Windows XP to Windows 7 Reference application.

From the C# Team

Eric Lippert

• Four switch oddities
• Precedence vs order, redux
• Not everything derives from object

Kirill Osenkov

• 5 min. screencast: Live Geometry overview
• Visual Studio Hotfix for Silverlight Development

Matt Warren

• Building a LINQ IQueryable provider - Part XV (IQToolkit v0.15)

Charlie Calvert

• Windows 7 Code Pack V. 1.0 Released

From other Microsoft Teams

Jason Zander

• Announcing the XP2Win7 Reference Application

Vijay Upadya

• Unit Testing Business Logic in .NET RIA Services

Scott Hanselman

• Hanselminutes Podcast 174 - Hanselminutiae-five with Richard Campbell
• Top 10 Tips Working Developers Should Know about Windows 7
• Vista Users - Uninstall Visual Studio 2010 Beta 1 before upgrading to Windows 7

Scott Guthrie

• ASP.NET MVC V2 Preview 1 Released

Brad Abrams

• Business Apps for Silverlight 3 RTM and .NET RIA: NHibernate
• Business Apps for Silverlight 3 RTM and .NET RIA: Hierarchical Data
• Business Apps for Silverlight 3 RTM and .NET RIA: Separate Solution Files

Wriju Ghosh

• C# 4.0 : Co-variance and Contra-variance

From the Community

Written by Various Authors

• Abel Avram: SQLite Ported to .NET
• Nate: Painless REST via ASP.NET MVC
• Malcolm Sheridan: Two New Features of C# 4.0 You Will Love
• Troy Goode: ASP.NET MVC Membership Kit
• DotNetCube: Using the Adapter Pattern in C#