How to use Func<T> & Linq with .NET framework 3.0

I've been developing a WPF application with .NET framework 3.5 and later had to change to 3.0. Some of the features like Func<T> (System.Core.dl开发者_JAVA技巧l) and Linq is not available now and VS throws compile errors to my existing code. How can I use 3.5 features in 3.0?

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Try this: How to Use .NET 3.5 Features and C# 3.0 Syntax in .NET 2.0?.

Here are the steps:

1. Referencing LinqBridge
2. Referencing System.Core
3. Implementing features yourself