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LINQ

LINQ is a set of extensions to the .NET Framework that encompass language-integrated query, set, and transform operations. It extends C# and Visual Basic with native language syntax for queries and provides class libraries to take advantage of these capabilities.

Featured Information

Essential LINQ (Microsoft .NET Development Series) [ http://www.amazon.com/Essential-LINQ-Microsoft-NET-Development/dp/0321564162/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1237620099&sr=8-1 ]

LINQ is one of Microsoft’s most exciting, powerful new development technologies. Essential LINQ is the first LINQ book written by leading members of Microsoft’s LINQ and C# teams.

LINQ to XML

LINQ to XML was developed with Language-Integrated Query over XML in mind and takes advantage of standard query operators and adds query extensions specific to XML.

Information

Downloads

Full Visual Studio 2008: 90-Day Trial

Videos

Future Directions for Data Programming in Visual Basic [ http://channel9.msdn.com/showpost.aspx?postid=116700 ]

Join Paul Vick and Amanda Silver as they discuss some of the features coming in Visual Basic 9.0.

Using Visual Basic as a Dynamic Programming Language [ http://channel9.msdn.com/showpost.aspx?postid=116702 ]

Paul Vick and Erik Meijer talk about the dynamic aspects of programming in Visual Basic, both in Visual Basic 2005 and Visual Basic 9.0.

C# 3.0 Language Enhancements in Action [ http://download.microsoft.com/download/4/7/0/4703eba2-78c4-4b09-8912-69f6c38d3a56/LanguageEnhancements.wmv ]

See the changes proposed to C# 3.0 in action. This video showcases implicit variable declaration, extension methods and lambda expressions. This presentation is based on an earlier release of the Microsoft Visual Studio Code Name “Orcas” C# LINQ CTP.  

C# 3.0 LINQ in Action [ http://download.microsoft.com/download/4/7/0/4703eba2-78c4-4b09-8912-69f6c38d3a56/LINQ.wmv ]

This video showcases the use of The LINQ Project with C# 3.0. In this video, LINQ is used to query in-memory data stores. This presentation is based on an earlier release of the Microsoft Visual Studio Code Name “Orcas” C# LINQ CTP.

C# 3.0 XLinq in Action [ http://download.microsoft.com/download/4/7/0/4703eba2-78c4-4b09-8912-69f6c38d3a56/XLinq.wmv ]

This video showcases the use of The LINQ Project with C# 3.0. In this video, LINQ is used to query XML files. This presentation is based on an earlier release of the Microsoft Visual Studio Code Name “Orcas” C# LINQ CTP.  

C# 3.0 DLinq in Action [ http://download.microsoft.com/download/4/7/0/4703eba2-78c4-4b09-8912-69f6c38d3a56/Dlinq.wmv ]

This video showcases the use of The LINQ Project with C# 3.0. In this video, LINQ is used to query relational databases. This presentation is based on an earlier release of the Microsoft Visual Studio Code Name “Orcas” C# LINQ CTP.

Hands-on Labs

Visual Basic 9.0 Specific Information

Overview of Visual Basic 9.0 [ http://msdn2.microsoft.com/en-us/library/ms364068.aspx ]

Read about the proposed changes to Visual Basic.

Visual Basic LINQ Samples [ http://msdn2.microsoft.com/en-us/vbasic/bb330936.aspx ]
Visual Basic 9.0 Language Specification [ http://go.microsoft.com/fwlink/?LinkID=102846 ]

Download and read the full Visual Basic 9.0 Language Specification.

Visual C# 3.0 Specific Information

C# 3.0 Language Specification [ http://download.microsoft.com/download/9/5/0/9503e33e-fde6-4aed-b5d0-ffe749822f1b/csharp%203.0%20specification.doc ]

Read about the proposed changes to the C# language.

Forums

The LINQ Project General Forum [ http://social.msdn.microsoft.com/forums/en-US/linqprojectgeneral/threads/ ]

Ask questions about the LINQ Project. The LINQ Project delivers Language Integrated Query (LINQ) for objects, relational, XML, and other forms of data.

Recent Posts LINQ Forum RSS Feed [ http://services.social.microsoft.com/feeds/feed/query/type/forum/eq/datatype/thread/eq/and/forumid/4CE19F39-4D93-4520-8516-FE9CF777CD3A/eq/and ]

Convert SQL to LINQ [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=4c06cda9-5eb7-43e3-be8b-c59c27b02568&title=Convert+SQL+to+LINQ&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f4c06cda9-5eb7-43e3-be8b-c59c27b02568%2f&k=A0k0LkRyToETpX1%2f6%2f8ayl%2bBquvbyhdik5ZrUXLr5a4%3d ]
I'm trying to convert the following SQL to LINQ, but so far... more [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=4c06cda9-5eb7-43e3-be8b-c59c27b02568&title=Convert+SQL+to+LINQ&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f4c06cda9-5eb7-43e3-be8b-c59c27b02568%2f&k=A0k0LkRyToETpX1%2f6%2f8ayl%2bBquvbyhdik5ZrUXLr5a4%3d ]
Remove duplicate rows based on max(date) [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=f6410ef6-8f46-41e8-9355-ac794823c1da&title=Remove+duplicate+rows+based+on+max(date)&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2ff6410ef6-8f46-41e8-9355-ac794823c1da%2f&k=Ntco1gfLEL0mrhbNelYKhjkhV8eQ7T7xNqdnK4wZF%2bE%3d ]
Hi Greetings!I need a query to retain the records with lates... more [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=f6410ef6-8f46-41e8-9355-ac794823c1da&title=Remove+duplicate+rows+based+on+max(date)&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2ff6410ef6-8f46-41e8-9355-ac794823c1da%2f&k=Ntco1gfLEL0mrhbNelYKhjkhV8eQ7T7xNqdnK4wZF%2bE%3d ]
LINQ orderby not working [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=762082a5-868b-4ab8-9cb5-c1a9e45772d8&title=LINQ+orderby+not+working&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f762082a5-868b-4ab8-9cb5-c1a9e45772d8%2f&k=sLFaYEBqQZzFXV5XKTuCbcm2Nh7X136fdNI%2fEYwdi4I%3d ]
when I use LINQ orderby , for example col1 when sql server 2... more [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=762082a5-868b-4ab8-9cb5-c1a9e45772d8&title=LINQ+orderby+not+working&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f762082a5-868b-4ab8-9cb5-c1a9e45772d8%2f&k=sLFaYEBqQZzFXV5XKTuCbcm2Nh7X136fdNI%2fEYwdi4I%3d ]
How to Sum the grouped field [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=998dbae8-17ea-4026-8fcb-acafbb5dc37a&title=How+to+Sum+the+grouped+field&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f998dbae8-17ea-4026-8fcb-acafbb5dc37a%2f&k=md611gAIyeVf4mD1s9F5Opz%2fvnQ1PCuwc9L6ux6xzmw%3d ]
I've a list of tasks. Ie I've struct like     struct Task   ... more [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=998dbae8-17ea-4026-8fcb-acafbb5dc37a&title=How+to+Sum+the+grouped+field&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f998dbae8-17ea-4026-8fcb-acafbb5dc37a%2f&k=md611gAIyeVf4mD1s9F5Opz%2fvnQ1PCuwc9L6ux6xzmw%3d ]
Where / (i And 1) = 1) [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=64c2076c-236e-4975-a66b-6fe465b4925b&title=Where+%2f+(i+And+1)+%3d+1)&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f64c2076c-236e-4975-a66b-6fe465b4925b%2f&k=luEcD2WCtDMFWY7mn0eK5Od9OoWNoJ2p54%2bzjFS7jIU%3d ]
I am currently reading ProLINQ in VB2008.  This book has the... more [ http://services.social.microsoft.com/feeds/FeedItem?feedId=00000000-0000-0000-0000-000000000000&itemId=64c2076c-236e-4975-a66b-6fe465b4925b&title=Where+%2f+(i+And+1)+%3d+1)&uri=http%3a%2f%2fsocial.msdn.microsoft.com%2fForums%2fen-US%2flinqprojectgeneral%2fthread%2f64c2076c-236e-4975-a66b-6fe465b4925b%2f&k=luEcD2WCtDMFWY7mn0eK5Od9OoWNoJ2p54%2bzjFS7jIU%3d ]

LINQ Bloggers

Paul Vick Paul Vick RSS Feed [ http://www.panopticoncentral.net/Rss.aspx ]

Radio Silence [ http://panopticoncentral.net/archive/2009/11/04/24817.aspx ]
Gosh, it’s been six months since I’ve said anything on this blog. I was beginning to wonder myself whether I’d ever come back or if this just would be... more [ http://panopticoncentral.net/archive/2009/11/04/24817.aspx ]
More... [ http://www.panopticoncentral.net/default.aspx ]

The Visual Basic Team Visual Basic Team RSS Feed [ http://blogs.msdn.com/vbteam/rss.xml ]

Spot the Bug! – The Key to using Anonymous Types (Jonathan Aneja) [ http://blogs.msdn.com/vbteam/archive/2009/11/16/spot-the-bug-the-key-to-using-anonymous-types-jonathan-aneja.aspx ]
This one’s going to be long, but for those of you who’ve felt the first 3 in this series were too easy I promise this one’s tougher J.   Let’s sa... more [ http://blogs.msdn.com/vbteam/archive/2009/11/16/spot-the-bug-the-key-to-using-anonymous-types-jonathan-aneja.aspx ]
More... [ http://blogs.msdn.com/vbteam/ ]

Dinesh Kulkarni Dinesh Kulkarni RSS Feed [ http://blogs.msdn.com/dinesh.kulkarni/rss.xml ]

.NET RIA Services Resources (for March 2009 Preview) [ http://blogs.msdn.com/dinesh.kulkarni/archive/2009/03/26/net-ria-services-resource-for-march-2009-preview.aspx ]
Some of it is covered in my previous post and on Silverlight.net but here is a summary: Bits (prereq: Visual Studio 2008 SP1, Silverlight 3 beta tool... more [ http://blogs.msdn.com/dinesh.kulkarni/archive/2009/03/26/net-ria-services-resource-for-march-2009-preview.aspx ]
More... [ http://blogs.msdn.com/dinesh.kulkarni/ ]

Matt Warren Matt Warren RSS Feed [ http://blogs.msdn.com/mattwar/rss.xml ]

Building a LINQ IQueryable Provider – Part XVI (IQToolkit 0.16) [ http://blogs.msdn.com/mattwar/archive/2009/09/15/building-a-linq-iqueryable-provider-part-xvi-iqtoolkit-0-16.aspx ]
This is the sixteenth in a series of posts on how to build a LINQ IQueryable provider. If you have not read the previous posts you might try rolling i... more [ http://blogs.msdn.com/mattwar/archive/2009/09/15/building-a-linq-iqueryable-provider-part-xvi-iqtoolkit-0-16.aspx ]
More... [ http://blogs.msdn.com/mattwar/ ]

The XML Team The XML Team RSS Feed [ http://blogs.msdn.com/xmlteam/rss.xml ]

Understanding XML Schema Sets in the XSD Designer [ http://blogs.msdn.com/xmlteam/archive/2009/06/04/understanding-xml-schema-sets-in-the-xsd-designer.aspx ]
We have recently blogged about the new XML Schema Designer and the various views over schemas offered by it. We visit here the concept of schema sets,... more [ http://blogs.msdn.com/xmlteam/archive/2009/06/04/understanding-xml-schema-sets-in-the-xsd-designer.aspx ]
More... [ http://blogs.msdn.com/xmlteam.aspx ]

LINQ over DataSet Team LINQ over DataSet Team [ http://blogs.msdn.com/aconrad/rss.xml ]

Project Astoria == ADO.NET Data Services == WCF Data Services [ http://blogs.msdn.com/aconrad/archive/2009/11/18/project-astoria-ado-net-data-services-wcf-data-services.aspx ]
As announced at PDC this afternoon by Pablo, the ADO.NET Data Services framework is being renamed WCF Data Services as the first part of a long term... more [ http://blogs.msdn.com/aconrad/archive/2009/11/18/project-astoria-ado-net-data-services-wcf-data-services.aspx ]

More... [ http://blogs.msdn.com/aconrad.aspx ]

LINQ in the News

These articles provide a historical overview of LINQ, reasons behind its development, and details the benefits and features LINQ offers to developers.
Looking to LINQ [ http://reddevnews.com/features/article.aspx?editorialsid=707 ]

Will Microsoft's Language Integrated Query transform programmatic data access?