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In Moss 2010 we can use LINQ syntax for getting items from list instead of using traditional method using spquery. for that we have to follow some steps: step 1:First we have to run some command for generate some entity classes which Visual Studio 2010 can use to get IntelliSense, and allows for LINQ-based queries to be performed on our sharepoint lists. There is one tool in 14\bin folder folder named SPMetal.exe open CMD run this command SPMetal.exe /web:http://mycustomsite /code:C:\CustomEntityFile.cs TO be continued.........

With .NET Framework 3.5 Microsoft released Language Integrated Query called LINQ. LINQ enables developers to query data sources using a query like syntax with both C# and VB.NET. These data sources can be collections, SQL Server databases, XML, DataSets etc. The .NET framework 3.5 introduces us to the following query keywords; from / in - Specifies the data source where - Conditional boolean expression (e.g. i == 0) orderby (ascending/descending) - Sorts the results into ascending or descending order select - Adds the result to the return type group / by - Groups the results based on a given key There are more keywords that provide additional functionality for more details please go through this msdn link LINQ

http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2009/12/02/adding-and-deploying-solutions-with-powershell-in-sharepoint-2010.aspx