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For Java language or .NET programmer, db4o embedded object database is very useful to build a strong application for cross platform operating system.. As another open source product by community of developers from around the world, db4o always continuously update and keep from bugs. This can be trustable and kick the worries out from Java and .NET programmer’s mind of stability and security of their application that they develops. But there is a new database technology related to db4o embedded object database, that will make all .NET programmers are easier to apply db4o to their application development. It’s called LINQ (Language Integrated Queries).

This is new interface concept for .NET Framework that adds native data querying capabilities using syntax reminiscent of SQL.The result of LINQ usage is optimization .NET expression for database query and raising the fastest result for querying operation. And the main target is the downsizing application and reducing access time for all database operation of Java or .NET

Ready to take advantage of LINQ with C# 3.0? This guide has the detail you need to grasp Microsoft's new querying technology, and concise explanations to help you learn it quickly. And once you begin to apply LINQ, the book serves as an on-the-job reference when you need immediate reminders. All the examples in the LINQ Pocket Reference are preloaded into LINQPad, the highly praised utility that lets you work with LINQ interactively. Created by the authors and free to download, LINQPad will not only help you learn LINQ, it will have you thinking in LINQ. This reference explains: LINQ's key concepts, such as deferred execution, iterator chaining, and type inference in lambda expressions The differences between local and interpreted queries C# 3.0's query syntax in detail-including multiple generators, joining, grouping, query continuations, and more Query syntax versus lambda syntax, and mixed syntax queries Composition and projection strategies for complex queries All of LINQ's 40-plus query operators How to write efficient LINQ to SQL queries How to build expression trees from scratch All of LINQ to XML's types and their advanced use LINQ promises to be the locus of a thriving ecosystem for many years to come. This small book gives you a huge head start. "The authors built a tool (LINQPad) that lets you experiment with LINQ interactively in a way that the designers of LINQ themselves don't support, and the tool has all kinds of wonderful features that LINQ, SQL and Regular Expression programmers alike will want to use regularly long after they've read the book." -Chris Sells, Connected Systems Program Manager, Microsoft.