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Sorry Kiran,
This question is almost impossible to answer. As well as neglecting to state your objective, you have provided no context in terms of what you are trying to achieve.
Have a read of Quan Mai's blog post here, to help you better understand how to help up help you.
Can anyone tell me how to create a extension in EPiserver. I have create social login, rating and review product our company, I am stuck to create a extension.