.Net中LINQ和Lambda表达式的效率和性能是什么?

I have used .Net 3.5 and VS 2008 for more than a month. Like most .Net developers, I have evolved from years experience in .Net 1.0 & 2.0 and VS 2005. Just recently, I discovered the simplicity and power of LINQ and Lambda Expressions, as in my recent questions such as I have used .Net 3.5 and VS 2008 for more than