I ran acrossed this new "LINQ-toSQL" thing, It's pretty amazing, but my question is, What's the best pratice in the real world that people used? It seems like using LINQ will embed all the Business Logic into the code, instead of keeping on the Database side(Stored Proecedure)? Isn't it harded to maintain them in the future? People told me we shuold keep most of the BL part in the SP, then inside the code. If that's true, what's the point of LINQ-SQL... Need some advice here.