How I can login in window application by using EDMX file

Question

Hi,
I am learning EDMX file entities model in C#, now i want to login in window application by using edmx entities how i can achieve it can anyone suggest me?
i want to login by using edmx entities.please if anyone can give me screen shots and code please.


I tried create a edmx file and now i want to login via edmx entities, how we can code for that.in my project there are two layer first UI and second is for database