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Is repository pattern is useful with entity framework or not

What I have tried:

searching on google and asking for friend but i am not get any idea
Updated 2-Nov-16 3:56am
[no name] 2-Nov-16 7:01am    
If it helps you solve a problem, then sure it's useful.

Many argue that EF already implements Repository pattern, so there is no point in abstracting the abstraction....
But, I'm glad I created my own abstraction over it. So one could easily change from EF to another OR-mapper - but I think this is a quite unlikely scenario... But what happens all the time is that there is a new version of EF - and not having to change the dependency (to EF) in a lot of projects is a big benefit. Also writing unit-tests for the data-access code is easier (e.g. by injecting an In-Memory-Repository implementation, which doesn't need a database or -connection for Tests.

So in general (mostly if you use generated models) there is no Point in creating your own absraction over EF.
In very big solutions with many projects, dependency mmnagement is crucial (think about creating Setups and so on). So additional abstraction can have it's benefits. (many other solution possible)

I'd say: If you see a real reason to create your own abstratction, do it. If you don't have one now - follow the YAGNI prinicple!!!

Kind regards Johannes
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The Repository pattern hides the details of how the data is stored/retrieved. If that makes your code easier to read and/or understand then it is "useful". Try reading the examples of Repository pattern here [^] and here[^]
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