Hi Sailaja,
Best
MVC tutorial link[
^] which has CRUD operations, which will definitely useful for you.
After completing you will such a nice idea about MVC and CRUD operation to do with MVC.
I suggest this link because its official link and its more preferable to beginners.
Presentation layer - MVC
Service Layer - WCF
Buniess Layer - C# library
DataAccess layer - C# library
Flow should be like Presentation->Servie->Business->DataAccess
Updated solution as per your request:
You can refer this
link[
^] for 3 tier architecture.
Still you are not satisfied with a solution just click this
link[
^]
Hope this helps you a bit.
Regards,
RK