C#-WPF MVVM entity framework(code first approach)

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C#

MVVM

entity-framework

Can anyone provide an example, or point  me to a walkthrough? 
I need clarification on how to make a sql table(SQL Express) using code first approach in entity framework model and:(add, edit, save & delete) in that table, and to do that using MVVM pattern, in a WPF application. 
Specifically I am facing a problem in trying to create the database using the c# code in the wpf application

I would really appreciate advice.

What I have tried:

i have tried to create the wpf application for existing database using database first approach but i am having doubts while trying to convert that to MVVM pattern