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copied!<p>Jeevan,</p> <p>I think you're unfortunately following a train of thought that many developers new to MVC take insofar as you've been 'fed' a belief that the 'M' in mvc (model) is purely a linq2sql flat implementation and that's it for the model. Not so... in our apps we have to cater for a mixture of web/desktop and handheld devices all using various areas of common functionality within them. we therefore have created a 'BLL/DAL' dll with all our business logic that is referenced as the 'M' in our mvc apps. This same 'bll/dal' is used in our webforms apps as well as in our desktop apps. in one current app, we're hooking into an oracle backend with our bll/dal dll and using MVC purely as a RESTful service acting as an intermediary between two legacy systems. given the design of our bll/dal dll, we could just as easily switch that to sqlserver, should (as and when) the business require.</p> <p>so in a nutshell, the proposition of choosing MVC or 3 tier (and i actually think you are meaning layered, rather than tiered [which relates more to physical separation of functionality/services]) is totally a moot point as they are converging, rather than disparate technologies.</p> <p>hope this helps - i'll try to source some examples via mr google later today to exemplify the fullness of my approach.</p> <p><strong>[edit]</strong> - from a similar question here on SO; <em>N-tier just refers to the physical structure of an implementation. These two are sometimes confused because an MVC design is often implemented using an N-tier architecture.</em></p> <p><a href="https://stackoverflow.com/questions/698220/mvc-vs-n-tier-architecture">MVC Vs n-tier architecture</a></p> <p><strong><em>in a nutshell</em></strong>, one is object/API design, one is system architecture; both can live happily together.</p>

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