LINQ to SQL -DAL

I wish to Implement LINQ-to-SQL as my Data Access Layer. I am using SQL Server. Is there any 开发者_JAVA技巧Linq-to-SQL framework (commercial or open source) available that can function like Application Block (caching block, validation, etc..)?

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Microsoft provide a Linq to SQL framework. There are plenty of articles about it in the web, e.g.

LINQ to SQL

Using LINQ to SQL (Part 1)